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Hey helpful XDA'rs,
After somehow avoiding to have a tablet for this many years, I decided to get a 2ndhand Touchpad after seeing all the reviews, ROM support, price to relative specs, etc... so I bought a second hand 32GB tablet off of ebay. In fact, this one right here... http://www.ebay.com/itm/271192613408?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
Anyways, I got it earlier today, and plugged it into the wall charger it came with (the circular OEM HP one, with the long cable with a silver circle on each end). When I plugged it in, the little white alternating light under the home button switched on, so I figured it was working. Had it plugged in for about a half hour before I decided I couldn't contain my excitement and wanted to power it up. Of course nothing happened. Just a black screen and that little white alternating light mocking me.
I immediately hit up the google machine and XDA and realized that the screen was supposed to be on with an actual charging icon/animation or something like that. Up to this point, I still have not seen any sort of anything appear on screen. Just that little white light. Now yes, I've read through the posts.
First I checked to see if the HP charger/cable would charge my GS2. It did, and quickly (not some sissy trickle charge) and the circular HP thing felt warm to the touch. I also unscrewed the cylinder HP charger and blew in there with my breath pretty hard to clear out any possible dust, then screwed it back on tightly. I have used different cables with the HP charger, and used the HP cable with my GS2 charger. Same results, just that mocking little light, and the HP cylinder did not feel warm to the touch.
I have done pretty much all the button combinations I could find for at least a minute, with no results. Power + home, power + rapid firing the home button, power + volume up + home, power + both volume + home, etc. This is with the charger plugged into the wall.
I did notice two changes though.
#1 When I hold power + home, after maybe 12 seconds, the light stops alternating and is off - for about 2 seconds. Then the alternating starts back up. When the alternating light stops when I do this, it is always for the same amount of time, about 2 seconds, then it starts up again, regardless of if I continue holding the power + home, or if I immediately let go of the buttons, or immediately let go and then try pushing other buttons; it is always the same, the flashing stops after about 12 seconds, pauses with no lights at all for about 2 seconds, and then starts back up again.
#2 When I hold power + home + volume up, after about 12 seconds, the white alternating stops completely and never comes back if I don't do anything else. There are only 3 ways that I have found so far that will get the alternating white light back. First, just simply unplug and replug in, the light immediately comes back. 2nd and 3rd ways are to do the previous two button combos again, (power/home or power/volup/home for about 12 seconds).
MOVING FORWARD, here's where some interesting things happened, which hopefully is enough to have someone knowledgeable know what might be going on.
I decided to try #1 and #2 again, but this time, instead of the wall charger, I plugged the USB cable into one of my computer USB ports. My computer didn't make a device connect sound, nor show any kind of drive being connected in my computer. Just the same alternating white light.
Trying method #1 above, did the same thing. Power/home, alternating light would turn off for 2 seconds then start back up. Still no sounds from computer.
Trying method #2, finally something! When I held power/home/volup, after about 12 seconds the alternating light would turn off for good as expected, but then my computer made a noise! Not the device connected sound (low note to high note sound), not even the device disconnected sound (high note to low note), but that 3rd "device failed to connect" sound, the (three low tone sound). If you go to your windows sounds you'll know which sound I'm talking about. Anyways, I was glad to hear that the computer realized something was there. Although it was just a sound. Nothing in my computer, but for a second I did see a pop-up bubble in my lower right hand notifications say "device did not install correctly" or something like that. Now, with the touchpad still plugged into USB, and the alternating light off, if I either remove the cable (or hold power/home or power/home/volup for 12 seconds so the alternating light goes back on) then my computer makes that "device disconnected" sound. The hell is going on? I can duplicate those two sounds (the device failed to connect sound, and the device disconnected sound) over and over by holding power/home/volup for 12 seconds, and then unplugging and replugging the USB.
Having said all this, anyone have any ideas? Again, up until this point, I have yet to see anything appear on screen. Just that damn white alternating light.
I also know that this might also be a case of the really dead battery. It may just need to charge for like 48 hours via HP wall charger, or it may need to trickle charge for like 48 hours via USB to computer. If that's what it takes, but jesus I'm impatient and don't want to wait a week or longer, especially if I have a small window of opportunity to return this via ebay. So for tonight, I'm going to trickle charge via USB, but with the alternating light OFF via method #2, because at least with #2 and the light off, my computer makes a sound confirming something is plugged in. My rationale is that if it thinks something is plugged in, it will charge it.
Thoughts guys? A million thanks to anyone who actually read this entire essay and is still willing to help out!
Edit: the USB trickle charge I am attempting overnight tonight is via my GS2 cable, NOT the HP cable, since I've read all over the place that the HP cable is of poor quality.
Sometimes, when the battery has been completely depleted, it takes a real long while (24+ hours).
Your cable and charger seem to be Ok, so just plug it into the wall and check on it it tomorrow.
Post again if you keep having problems and we should be able to help you.
Good luck.
Not sure it will help but but holding power,home and volume down button is reboot ,I've had to hold it for 15 to 17 seconds before....
Check here also : http://forums.webosnation.com/hp-touchpad/292681-help-new-touchpad-wont-turn.html
Sent from my skz_tenderloin using xda premium
When i got my touchpad it was deeply discharged. I had to let it charge for several hours before it did anything at all. However i used the weak Samsung charger, so there was at least that message "please use the original charger" on the screen. So maybe you just need to wait...
Good luck though
Cheers
Chris
To my joy, I woke up today with the screen on displaying a low battery charging icon. It's in the red though, but that's definitely progress. Is there a charging animation, or is it just a still icon? Mine has no animation and wanted to make sure mine didn't freeze.
I wanna say there is no animation just the icon (its been a long time since I've seen it ) but it only needs around 10% to boot... Now that you see the icon try holding the power and home button for 15sec and see if it boots.
Sent from my skz_tenderloin using xda premium
I went and grabbed some food and upon returning I saw that my TP had completely turned itself on and was on some sort of setup screen, asking for me to select a language. I'm running through the setup now - two things. First, is it necessary to create a webOS account? Kinda like creating a google account for android? I intend on installing cyanogen10 on this, but wasn't sure if a weOS account was necessary. Or perhaps it's helpful. Second, the touch response is HORRIBLE right now doing the setup, takes multiple attempts to push an area, and with much more pressure than I would think is necessary. I'm assuming this is to low battery,. and it will improve as the battery returns to normal levels?
Not sure about the touch response issue but the low battery could be a possibility , as for the webos account i believe you only need to do that in order to use webos , i would do it anyways though .
Check here if you don't feel like making a webos acct: http://forums.webosnation.com/android-webos/318426-how-install-android-without-setting-up-webos.html
Sent from my skz_tenderloin using xda premium
Yeah it was low battery. After a little more charging the touch response works fine now. Thanks! I was really stressing that I received a dead TP.
There are several programs available in the play store that will turn your tablet off when the battery % reaches a certain level. I use Automatelt (thanks to sstar for the tip) set at 20 %.
ManImCool said:
Yeah it was low battery. After a little more charging the touch response works fine now. Thanks! I was really stressing that I received a dead TP.
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Good to hear ! Happy installing /flashing.
Sent from my skz_tenderloin using xda premium
chicle_11 said:
There are several programs available in the play store that will turn your tablet off when the battery % reaches a certain level. I use Automatelt (thanks to sstar for the tip) set at 20 %.
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Is 20% the general consensus around XDA where it shouldn't go any lower than? Are some people setting it higher? Lower?
I have mine at 9% . some prefer more battery left to feel safer i suppose , basically you don't want to let your tp battery drain completely because it might possibly brick
Sent from my skz_tenderloin using xda premium
I have built a Nexus 7 into my car and I have a small issue.
I need a tasker profile:
When I turn the car on, the screen turns on and music plays.
When i turn the car off, the music stops and the screen turns off. (along with other stuff)
I have created a "test" version of all this so when I connect a power cable (i.e when charging) it turns the screen on and plays music.
When I disconnect the USB (i.e. stops charging) the screen goes off, music stops, bluetooth off etc and all this works fine.
However, the USB will always be connected with power coming through so I cannot use this option. I need another way to detect if the car is on and when it turns off so I can run the correct tasks.
One option i thought of is buy a wireless charger and build it into the car. When my phone is placed on the charger, send a text message to the tablet to turn it on, and when i turn the car off the charging will stop, then the phone will send a text to the tablet to turn the screen off etc.
However after purchasing the wireless charger, i realised everytime i get a call or take my phone of the charger for whatever reason, the screen will go off and music will stop, so this isnt an option either.
So the question is, what can i do so tasker can detect that the car is on or off so the nexus can perform the tasks?
Hope that makes sense
idi_idi said:
ISo the question is, what can i do so tasker can detect that the car is on or off so the nexus can perform the tasks?
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You do realize that you really have two problems, right? The Nexus 7 will not know when the car is started, or stopped. Unless you can disconnect the power, manually etc.. If you can do that, you can send a command in fastboot to force the N7 to power up when power is connected, otherwise you'd have to boot it up manually.
You could unplug the USB charger.. Or have the tablet turn off after N hours of inactivity, although how do you detect "new" activity if there's no change when the car is started.
If your car has bluetooth, you could detect that as the "turn off" task perhaps, but turning on is probably your bigger issue.
Will the wireless charger idea work?
idi_idi said:
Will the wireless charger idea work?
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No idea what you mean by wireless charger (2012 model has no wireless charging), or how you'd control it with the phone. And unless your tablet is a 3g one, I don't know how you'd directly communicate with it either.
I just put my phone back to stock so I had to uninstall Tasker, however your tablet does not pull power once the car is off correct? I had a power based one as well, I remember testing it with a surge protector. I could leave the USB connected but flip the surge protector on and off (to mimic power to the phone being halted). To my knowledge when the car is off your USB shouldn't be drawing power therefore you could run the profile off that. Export the profile and post here. I'd like to help test it.
Sent from my Nexus 5 using xda app-developers app
elpeterson said:
To my knowledge when the car is off your USB shouldn't be drawing power therefore you could run the profile off that. Export the profile and post here. I'd like to help test it.
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My last four cars (current and previous of wife and my cars) the lighter plug stays powered when the engine is off.
I think it's getting increasingly common for the plugs to stay powered. So there's no way for the tablet to know the car is off unless the car has bluetooth and you can look for that.
khaytsus said:
My last four cars (current and previous of wife and my cars) the lighter plug stays powered when the engine is off.
I think it's getting increasingly common for the plugs to stay powered. So there's no way for the tablet to know the car is off unless the car has bluetooth and you can look for that.
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I have actually found the exact opposite to me true. My wife's 2014 Pilot goes off as well as my 2012 Veloster whereas my 2001 Sable and her 2007 Passat left them on. I'm not sure if you can resolve your issue then. I'll keep looking into it. You could trigger it based on speed I think
Sent from my Nexus 5 using xda app-developers app
elpeterson said:
I have actually found the exact opposite to me true. My wife's 2014 Pilot goes off as well as my 2012 Veloster whereas my 2001 Sable and her 2007 Passat left them on. I'm not sure if you can resolve your issue then. I'll keep looking into it. You could trigger it based on speed I think
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I suppose that could work.. Find out the speed for several periods in a row, if it's zero, assume it's time to shut down. But that'd mean it's playing music etc during that period etc.
IMO bluetooth, or a plug he can turn off, is really the only way if his USB is powered up all of the time.
Also remember, he has no way to know when to power UP either. I still maintain that's the bigger problem, especially if it's a fixed install and he can't poke the power button
At the moment, its connected so when the car turns on, the USB is powered up and when the car turns off, the power in the USB stops. So at the moment, my tasker profile works on "when charging" do Task A, when not charging do Task B. And it all works fine at the moment.
However I am having issues with charging, (The device is not charging fast enough when turned on and the battery drains over a couple of days) so i planned to keep it always charging, so the power in the USB will always be there regardless of if the car is on or off. So i cant use the "when charging" on tasker anymore. So i needed a new way to it to figure out when i got in the car.
Here are my ideas:
1. Have a wireless charger in my car for my phone. (Not the tablet). When i get in the car, i could put my phone on the charger, have the phone send a text to the tablet to turn it on. When i remove the phone from the charger, send a text to the tablet to turn it off. Simples
2. Connect a wifi router in the boot or something and have it start up only when the car starts, and turn off with the car. It doesn't have to be connected to the internet, it just needs to power up. Then i can do a 'When wifi near' on tasker to see if the car is off or on, and turn the screen off accordingly.
3. Connect the tablet to my phones bluetooth. Whenever i get in the car, they will connect and the tablet will power on. when i leave the car, it will power off. (Not the best option since it will stay on even if i am near the car)
4. Similar to option 1, but have a nfc sticker in the car. when i swipe my phone on it, it communicates with the tablet and turns it on, n then off when required. but i dont want to do this since i know i am going to forget to turn it off one day.
I don't really want to do the speed option, since i want it to turn on as soon as i enter the car, not when i start driving, and i want to be able to park up and use it when i need to put an addess in the sat nav etc.
idi_idi said:
However I am having issues with charging, (The device is not charging fast enough when turned on and the battery drains over a couple of days)
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If your charger isn't charging fast enough, you're using a crappy charger or one that isn't designed for Android. If your car has a built-in USB port, those are usually super slow, maybe 500mA, most less.
Anyway, glad to hear that your power follows the car state, that makes it all simple.
khaytsus said:
If your charger isn't charging fast enough, you're using a crappy charger or one that isn't designed for Android. If your car has a built-in USB port, those are usually super slow, maybe 500mA, most less.
Anyway, glad to hear that your power follows the car state, that makes it all simple.
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I've tried about 20 different chargers, up to 2.5amps. The problem isnt the charger. The problem is i dont drive the car long enough to give it time to charge. So if i drive the car for about half an hour a day, for the other 23.5 hours, its on standby. so the battery is always going to go less. So thats why I plan to connect the charger directly to the battery so it will always be charging.
idi_idi said:
I've tried about 20 different chargers, up to 2.5amps. The problem isnt the charger. The problem is i dont drive the car long enough to give it time to charge. So if i drive the car for about half an hour a day, for the other 23.5 hours, its on standby. so the battery is always going to go less. So thats why I plan to connect the charger directly to the battery so it will always be charging.
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Click to collapse
Oh, I thought you had the tablet turning off when the car went off. If I were you, I'd set up a profile that turns off the tablet if it hasn't had power in a few hours, pretty simple to do. On Power, set a time var, every so often check that time var to see if it exceeds your threshold, and power down if so.
If you don't have much installed, it should be a fairly quick power-up, especially the plug goes hot when you start the car.
BTW I hope you're considering cold and heat if you're leaving the tablet in the car. Leaving it in the heat all summer will will the battery.
You can use Timur's kernel, it senses power to turn N7 on or deep sleep it.
Also charges N7 while using OTG.
It;s designed for car install.
khaytsus said:
If your charger isn't charging fast enough, you're using a crappy charger or one that isn't designed for Android. If your car has a built-in USB port, those are usually super slow, maybe 500mA, most less.
Anyway, glad to hear that your power follows the car state, that makes it all simple.
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I agree, you need to get at least a 2A charger for your car. My wife would watch Netflix on long drives and my car USB port or the normal USB charger I got for the cigarette lighter worked until I up'd it to a 2A charger. I can have screen on for hours while streaming video and still fully charge the tablet in a reasonable amount of time.
Hello how do you turn it off?
After I'm done and there is stil l the blue light so how does it turn of or go stand by thanks
Krisshp said:
Hello how do you turn it off?
After I'm done and there is stil l the blue light so how does it turn of or go stand by thanks
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Same way you turn off your refrigerator!
Asphyx said:
Same way you turn off your refrigerator!
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I shut the door lol
Honestly. How do I turn it off?
Krisshp said:
I shut the door lol
Honestly. How do I turn it off?
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LOL well the fridge doesn't go off when you close the door only when you unplug it!
The CCast is meant to stay on and wait for you to send something to it....
There is no Off switch.
It is afterall an APPLIANCE.
Asphyx said:
LOL well the fridge doesn't go off when you close the door only when you unplug it!
The CCast is meant to stay on and wait for you to send something to it....
There is no Off switch.
It is afterall an APPLIANCE.
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Haha. Kk. That makes sense
.
Krisshp said:
Haha. Kk. That makes sense
.
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It's very low power draw (someone recently checked it with a Kill-A-Watt) and having it on continuous power means:
Much less chance of mishap during a firmware update (since they happen without you knowing)
It can turn on your TV and switch it to the appropriate input, if your TV or connected device supports HDMI-CEC. Mine is connected to my sound bar's input box and it seems to change the TV to the correct channel as well as the sound bar box! Magic!!!
So many things don't turn "off" now. Instead they "sleep." My Xbox one is never "off", my blue ray is never " off" either. Its such a low power state that who really cares. I've tried to get my power bill down to the days of an apartment, but its impossible.
Sent from my SGH-T999 using Tapatalk
zul8er said:
I've tried to get my power bill down to the days of an apartment, but its impossible.
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Yeah, this I have tried (and failed at) too... seems only way that works is to update and consolidate, but I don't have that kind of cash.
-= this post enhanced with bonus mobile typos =-
Just about everything is computer controlled, uses some variation of Flash memory and all of that needs power...
Imagine if you had to wait for your TV to boot up before you could watch TV.
Or for your Router and Modem to boot up every time you wanted to use the internet...
almost nothing these days actually shuts off entirely.
I only plug it in to use it. When I'm done I pull the power cord from my usb. I worry that it could be in the middle of an update and if I turn off my TV something bad could happen.
Sent from my Nexus 10 using xda app-developers app
striker59 said:
I only plug it in to use it. When I'm done I pull the power cord from my usb.
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Same here.
It's installed in the man cave anyway. If I'm not going to be down there for a week, why let it draw power. But that's me...I'm also the guy that goes around behind everyone turning off lights and shutting things off that aren't being used. PC gets shut down at the end of the day and doesn't get turned on until its needed the next day. Laptops at least go into Hibernation. I don't leave phone chargers plugged into the wall either if they aren't charging a phone. Maybe it's an old school thing. LOL
Creepingdeath2 said:
Maybe it's an old school thing. LOL
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Old School with a Nickname like that says to me we probably got drunk in the same Metal bars back in the day before Online dating when you actually had to dress up, go to a bar to get laid or find your future ex wife! LOL
If you want you could always cut open a USB cable and just install your own on/off switch on the 5v power lead. The wiring diagram for USB cables is on Wikipedia.
But just out of curiosity I got out my own power meter and checked the Chromecast. It consumes less than 2 watts on standby with the screen background photos cycling (that's the lower limit that my power meter can read). While playing a Youtube video it's still only 2 watts, though from the way the reading varies it looks like it's slightly higher than standby. As far as I can tell it's independent of whether the TV is on or not.
DJames1 said:
If you want you could always cut open a USB cable and just install your own on/off switch on the 5v power lead. The wiring diagram for USB cables is on Wikipedia.
But just out of curiosity I got out my own power meter and checked the Chromecast. It consumes less than 2 watts on standby with the screen background photos cycling (that's the lower limit that my power meter can read). While playing a Youtube video it's still only 2 watts, though from the way the reading varies it looks like it's slightly higher than standby. As far as I can tell it's independent of whether the TV is on or not.
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Or get yourself a Clapper! LOL
Creepingdeath2 said:
PC gets shut down at the end of the day and doesn't get turned on until its needed the next day. Laptops at least go into Hibernation. I don't leave phone chargers plugged into the wall either if they aren't charyging a phone. Maybe it's an old school thing. LOL
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I'd shut down my PC save for the fact that it takes 20 minutes to become useable. Maybe I need SSD, heh.
I have some smart power control devices (TrickleStar, APC green UPS) too.
One thing I learned only a few years ago - if you unplug a battery powered device, DISCONNECT the device from the charger!
Even though it's not supposed to, some chargers allow some back flow and slow drain the device's battery, killing it.
-= this post enhanced with bonus mobile typos =-
Or get yourself a Clapper! LOL
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Now that was funny!
Old School with a Nickname like that says to me we probably got drunk in the same Metal bars back in the day before Online dating when you actually had to dress up, go to a bar to get laid or find your future ex wife! LOL
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And THIS was even funnier mostly because I'm sure it's very close to the truth. LOL
Asphyx said:
Or get yourself a Clapper! LOL
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Hey, that's a great idea!
But wait a minute, how many watts does a Clapper use? I bet it's more than 2 watts!
DJames1 said:
Hey, that's a great idea!
But wait a minute, how many watts does a Clapper use? I bet it's more than 2 watts!
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Yep there really is no point to trying to save power without just going over and unplugging it....
As of now there are only two reasons I can come up with for really wanting to power off a CCast...
1 - The damn thing will change inputs anytime it reboots or updates
2 - The CCast gets pretty hot after awhile...It just seems like the kind of device that if you do not have a conditioned power source coming into the house it could easily fry.
On a more serious note if thats all your worried about (not Power use) then anyone who has one of those X-10 Home automation systems can easily plug the CCast into a module and shut it off from the phone or tablet.
And if you don't care that the CCast can't turn the TV on and the TV has a USB port thats probably the best way to save power.
I personally don't trust the TV to give it stable power and you will find yourself having to unplug it anyway to reboot from time to time...
If you really have issues with a high Electric bill there are far better ways to save on that bill than powering down a CCast.
Even something as simple as keeping your Freezer fully packed will save more money in the long run than the few hours the CCast is unplugged.
I don't mind it consumes energy, it is very little but I am more concerned about the fact it will be broken faster. It's like a light bulb, when you are not using it, why does it need to stay on and will need to be replaced faster.
Also the chromecast gets quite hot. So without turning it off, it never gets a chance to cool down.
Liquid Li0n said:
I don't mind it consumes energy, it is very little but I am more concerned about the fact it will be broken faster. It's like a light bulb, when you are not using it, why does it need to stay on and will need to be replaced faster.
Also the chromecast gets quite hot. So without turning it off, it never gets a chance to cool down.
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Well the truth is silicon is not as fragile as a Light filament is...
Power Surges worry me but not just the act of being powered on....
It makes sense that it would be an always on device considering it needs to be there when you want it...
But some sort of sleep state might be a nice addition to any next generation model which I hope can also be wired to the network and use Wake On Lan to full power up when you want to cast.
There's millions of these devices around. If not laying in a draw or closet, they're on craigslist or ebay half of a N7'13, (2013 model should be considered if purchasing).
Share and discuss your setup, apps, and experiences here.
ROMs:
Timur's USBRom: Android 4.2 Jellybean. No longer developed.
http://www.adrive.com/public/hMdX4p/cm-10.1-20130817-USBROM-grouper.zip
Gapps: http://www.adrive.com/public/rj748P/gapps-jb-20130812-signed.zip
AutoDroid: Android 4.4.4 Kit Kat. No longer developed.
http://forum.xda-developers.com/showthread.php?t=2789993
*May have a problem booting after install. Flash a below kernel to fix.
Kernels:
Kangeroo: For Kit Kat ROMs. Inactive(?) since Jan 2014.
http://forum.xda-developers.com/showthread.php?t=2558717
Oxydo: For Lollipop ROMs.
http://forum.xda-developers.com/nexus-7/development/oxydo-revamped-kernel-nexus-7-2012-t2978950
Apps:
Headunit: Android Auto head unit app.
http://forum.xda-developers.com/gen...nit-android-auto-t3125252/page69#post62485618
Power Event Manager 1.8: Changes power settings for above kernels allowing tablet to sleep/wake with external power.
http://forum.xda-developers.com/showpost.php?p=62287264&postcount=145
App Ops: Or any permission manager you like.
https://play.google.com/store/apps/details?id=com.findsdk.apppermission
Autosleeper Auto power ON-OFF: I haven't tried this but functionality seems somewhat equivalent to PEM above.
https://play.google.com/store/apps/details?id=com.as.powerchecker
Wakelock Detector [Root]: Use with App Ops to stop apps keeping the tablet awake.
https://play.google.com/store/apps/details?id=com.uzumapps.wakelockdetector&hl=en
Trigger: Tasker-like app for automation. Simple set-up..
https://play.google.com/store/apps/details?id=com.jwsoft.nfcactionlauncher
Tasker: Powerful automation app but incredibly user unfriendly.
https://play.google.com/store/apps/details?id=net.dinglisch.android.taskerm
[*]Secure Settings: Allows Tasker to perform even more powerful automation.
https://play.google.com/store/apps/details?id=com.intangibleobject.securesettings.plugin
[*]Power Event Manager Helper: Helps PEM kill a few stubborn apps then put the tablet in lp0.
Attached in 2nd post.
Hardware:
OTG Cable: Don't cheap out here, charging for the tablet and phone must go through the wires.
http://www.amazon.com/dp/B00UJ5D5ZS?psc=1
http://www.amazon.com/gp/product/B00NSBVNCM?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
Ground Loop Isolator: Filters alternator, and charging whine. Doesn't degrade music quality.
http://www.amazon.com/gp/product/B00NSBVNCM?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
Digital Audio Convertor: Can be found locally at music stores. Fantastically excellent sound!!
http://www.behringer.com/EN/Products/UCA202.aspx
Others/Tips/etc:
Put the tablet in bootloader and type this command into CMD/terminal.
This makes the tablet to boot when external power is turned on without physically pressing the button, even if the battery has completely discharged.
Code:
fastboot oem off-mode-charge 0
If using a Lollipop ROM and experiencing the NlpCollectorWakeLock here's a fix, you must be rooted:
Remove com.google.android.gms with titanium backup (or another utility),
Download the latest "230" version of Google Play Services from apkmirror.com,
Install,
Reboot.
Smooth Scroll Mod: Possible created a random reboot on the order of once 3 or 4 days.
It goes without saying, maybe, but do not install 3rd party widgets. Beautiful Widgets for example will cause thousnads of different wakelocks though a night. -inadvertently tested.
Attached is my V2 blocked list for Debloater. It removes more apps, but leaves a few others for better stability.
V2 now removes Connectivity Services and Play Services. I recommend using on a clean install immediately going into airplane mode so no apps will start auto-updating.
With Play Services being removed by the app you will need to install with adb if no file manager is installed beforehand.
Created a Tasker app that helps Power Event Manager. Secure Settings and Power Event Manger is needed.
If PEM doesn't shut down in 7 seconds, The app closes some problem apps, hope you used the debloat list, and calls PEM to sleep the tablet. Upon wake up app then disables airplane mode.
My current setup [Edited 09/18]:
Stock lollipop, from factory image, rooted, with Oxydo-Revamp kernel.
All apps not suitable for stand-alone tablet use have been removed. Debloat list is above in post #2.
Power Event Manager installed as system app.
Es File Explorer for file management, and ftp file transfer.
$3.50 OTG cable from Amazon. Charging seems severely hampered. Tablet and phone both occasionally discharge.
OTG is now handled by the 2nd cable listed in the OP with Amazon Basic USB extensions. Charging problems fixed.
Cheap USB 2.0 hub with independent power. Simple and impressive mod.
Torque Pro with a ELM327.
Tasker. To kill apps and use Power Event Manager to put the tablet to sleep.
Now using my Power Event Manager Helper app.
Behringer UCA202 to stock stereo AUX input: This is an incredible mod. Highly recommend over bluetooth.
Notes:
Torque can keep the phone awake if configured improperly.
Leaving ES File Explorer in FTP mode will also cause a partial wakelock.
Google Play Services, and Google App are causing wakeup triggers every 2-3 minutes.
Power Event Manager combined with Oxydo kernel is putting the tablet to sleep reliably.
Power Event Manager isn't terribly reliable. The Tasker profile is set to kill apps and call PEM for when PEM alone fails.
My awake time with stripped system and Tasker is consistently 0% over 24 hours. Longer periods show Tasker awake for 2s!
Settings:
I use Synapse and UKM TricksterMod for kernel management. Since battery life isn't a primary concern, my settings are to maximize the tablet's performance.
Turning the Nexus7 into a "terminal" is about the only hope it has to run Lollipop.
Tablet can run music, maps, and youtube flawlessly. Chrome appears to be the biggest problem app.
CPU Minimum frequency is set a 640MHZ 340MHZ,
Maximum 1624MHZ 1500MHZ,
Ondemand Governor.
Splitting the power to use two chargers is super simple when you figure it out.
Open the hub,
Remove the red wire from the PCB, and tape it off.
Connect a salvaged USB cable's red wire to the where the previous was,
Connect the new black wire to the PCB with the existing black wire.
Green and white wires on new cable are not used.
Whoa, mine if using stock lollipop is barely usable (too slow especially when multitask). Then I installed tiimut'r usbrom it's a lot bettrr (but then I needed the inmersive mode).
Current setup is slimrom (slimkat 4.4.4), all converted to all-f2fs. I dont need usb host stuff (yet), so far i'm satisfied with it. Use macrodroid for auto on/off stuff, automate as launcher, google maps for navigation, spotify/poweramp for music, and dash command for obd2 stuff.
Sent from my LG-D802 using Tapatalk
tesna said:
Whoa, mine if using stock lollipop is barely usable (too slow especially when multitask). Then I installed tiimut'r usbrom it's a lot bettrr (but then I needed the inmersive mode).
Current setup is slimrom (slimkat 4.4.4), all converted to all-f2fs. I dont need usb host stuff (yet), so far i'm satisfied with it. Use macrodroid for auto on/off stuff, automate as launcher, google maps for navigation, spotify/poweramp for music, and dash command for obd2 stuff.
Sent from my LG-D802 using Tapatalk
Click to expand...
Click to collapse
I ran into the multitasking bit while setting up , everything last night.
With Torque and Headunit, running as it would in the car it's perfectly usable.
Open chrome, settings, es file explorer, and Ampere and it falls apart. Chrome is the biggest problem though.
How does Dash Command run for you? I've tried it, and seen many, that say the refresh rate is slow.
fr4nk1yn said:
I ran into the multitasking bit while setting up , everything last night.
With Torque and Headunit, running as it would in the car it's perfectly usable.
Open chrome, settings, es file explorer, and Ampere and it falls apart. Chrome is the biggest problem though.
How does Dash Command run for you? I've tried it, and seen many, that say the refresh rate is slow.
Click to expand...
Click to collapse
I had issues even opening up Google maps while in lollipop, soooo sllooooow. I only able to open maps, or music, or OBD stuff, cannot run them together. Now on kitkat I can run at least 2 apps simultaneously without any issues (like maps and music, or music and OBDII stuff). I did get issues when running three apps (music, maps, and obdII stuff). As for dashcommand, the refresh rates is quite ok for me. I like dashcommand morecompared to torque since it has nicer layout/themes out of the box. It's like having GTR multi information display that looks very factory.
I have another irritating issues though. If the nexus7 battery nearly full (above 90%) and charging. I hear a lot of strange noises, even when the engine is off. I touch the screen, doing any activities creates a lot of noises. if I disconnect the charger the noises are gone! and if the battery was like at 50% and charging no funny noises either. I was wondering how do I fix this.....
My setup is using the aux output of the nexus 7 to aux input of the factory bose head unit. Tried to use bluetooth to aux adapter but I did not like the sound quality (too many hissing noise) and also introduces alternator whine
Should I get the USB DAC thing?
tesna said:
I had issues even opening up Google maps while in lollipop, soooo sllooooow. I only able to open maps, or music, or OBD stuff, cannot run them together. Now on kitkat I can run at least 2 apps simultaneously without any issues (like maps and music, or music and OBDII stuff). I did get issues when running three apps (music, maps, and obdII stuff). As for dashcommand, the refresh rates is quite ok for me. I like dashcommand morecompared to torque since it has nicer layout/themes out of the box. It's like having GTR multi information display that looks very factory.
I have another irritating issues though. If the nexus7 battery nearly full (above 90%) and charging. I hear a lot of strange noises, even when the engine is off. I touch the screen, doing any activities creates a lot of noises. if I disconnect the charger the noises are gone! and if the battery was like at 50% and charging no funny noises either. I was wondering how do I fix this.....
My setup is using the aux output of the nexus 7 to aux input of the factory bose head unit. Tried to use bluetooth to aux adapter but I did not like the sound quality (too many hissing noise) and also introduces alternator whine
Should I get the USB DAC thing?
Click to expand...
Click to collapse
I'm sure lollipop is working so well because of everything I stripped out of it. I'm about to strip some more. Was working on gauges for torque. I'll give Dash Command another try though. It does look much better.
I'm still getting my cables added to my cart but you need one of these for noise:
http://www.amazon.com/PAC-SNI-1-3-5...=1440642269&sr=8-1&keywords=3.5mm+ground+loop
Are you using a stripped down stock ROM or you manually disabled everything?
fr4nk1yn said:
I'm sure lollipop is working so well because of everything I stripped out of it. I'm about to strip some more. Was working on gauges for torque. I'll give Dash Command another try though. It does look much better.
I'm still getting my cables added to my cart but you need one of these for noise:
http://www.amazon.com/PAC-SNI-1-3-5...=1440642269&sr=8-1&keywords=3.5mm+ground+loop
Click to expand...
Click to collapse
I just bought one of these.. (not exactly that brand), on mine one of the channels is not working so I only got one side audio channel only It also degrades the sound quality I think. I guess I need to bought the better one.
EDIT: What if I buy the ground loop isolator intended for 12volt line like this one? Install it on 12v cigarette lighter (before 12v to 5v dc-dc adapter). If this one works the audio quality will not changed as the ground is lifted on the 12v line.
gabrielbsb said:
Are you using a stripped down stock ROM or you manually disabled everything?
Click to expand...
Click to collapse
Yes, A manually stripped/blocked stock ROM.
tesna said:
I just bought one of these.. (not exactly that brand), on mine one of the channels is not working so I only got one side audio channel only It also degrades the sound quality I think. I guess I need to bought the better one.
Click to expand...
Click to collapse
Hopefully the one I ordered works. It has a decibal increase to make up for that degradation from the transformers.
fr4nk1yn said:
Hopefully the one I ordered works. It has a decibal increase to make up for that degradation from the transformers.
Click to expand...
Click to collapse
I ended up ordering one of these . Let's see how it goes few days from now when the package arrives (and time to install it)
Counting on PEM to sleep the tablet might not be the best idea. It only seems to actually do it IF the tablet is charging in OTG mode.
Tablet went dead in the car during a test possibly because the OTG cable, or another cable, is malfunctioning.
Might have to go Tasker although I've never gotten it to work properly for anything, and I've never accepted it won't demolish battery polling every few seconds.
Damn. Whatever happened to my tablet it appears to be dead. Won't power on, won't reboot. May be a short lived experiment.
I've ordered hundred of dollars worth of parts for the car so If it doesn't charge by Wednesday i'll have to buy a N7'13 off CL.
fr4nk1yn said:
Counting on PEM to sleep the tablet might not be the best idea. It only seems to actually do it IF the tablet is charging in OTG mode.
Tablet went dead in the car during a test possibly because the OTG cable, or another cable, is malfunctioning.
Might have to go Tasker although I've never gotten it to work properly for anything, and I've never accepted it won't demolish battery polling every few seconds.
Click to expand...
Click to collapse
I use Macrodroid to manage sleep/wake up on mine. Very simple app and easy to understand.
fr4nk1yn said:
Damn. Whatever happened to my tablet it appears to be dead. Won't power on, won't reboot. May be a short lived experiment.
I've ordered hundred of dollars worth of parts for the car so If it doesn't charge by Wednesday i'll have to buy a N7'13 off CL.
Click to expand...
Click to collapse
That's too bad maybe try to plug in to your pc and recognize adb or fastboot or something?
tesna said:
I use Macrodroid to manage sleep/wake up on mine. Very simple app and easy to understand.
Click to expand...
Click to collapse
I going to try it out. I'm quite used to Trigger, I haven't used it in awhile though and not for this type of power control.
tesna said:
That's too bad maybe try to plug in to your pc and recognize adb or fastboot or something?
Click to expand...
Click to collapse
Took it apart after not charging at all. Checked battery voltage, then voltage at the microUSB, tried powering it on, yet again, and it did. I did nothing different, same cable and charger. Wiggling and poking the socket it doesn't appear to have a loose connection.
My new OTG cable is on the proverbial slow boat so I can't eliminate that until early October!
tesna said:
I use Macrodroid to manage sleep/wake up on mine. Very simple app and easy to understand.
Click to expand...
Click to collapse
Care to give your macros for power? It's time to try other methods of forcing the tablet to sleep.
Tasker, as usual, is impossible.
fr4nk1yn said:
Care to give your macros for power? It's time to try other methods of forcing the tablet to sleep.
Tasker, as usual, is impossible.
Click to expand...
Click to collapse
My macro is pretty simple, I just set on charger connect, screen on, run app A,B,C Then another macro on charger disconnect, screen off, close app ABC (killing navigation apps, music, OBD stuff). You can apply also turn on/off airplane mode, turn/off mobile data, wifi AP, etc but I decided to keep them on even when not charging to track the location of my car in case my car got stolen lol. Another macro that I occasionally use is, turning off the tablet when the charger is disconnected (key ACC off). No need another macro since the tablet will auto power on when charger is connected (key ACC on).
Before macrodroid I was using condi, and it was not always working.
@tesna Thanks. While playing with Tasker I found it doesn't actually cause deep sleep, just shuts down radios.
We really need a kernel with some of the newer improvements. And firm sleep.
Since my car isn't a daily driver and only goes out for relatively short trips the tablet will eventually go completely dead.
@fr4nkl1yn, there's simpler solution to that problem. Just set in tasker/macrodroid to turn off the tablet once the ignition key is on the off position (charger disconnected). Bam no battery drain issue...
tesna said:
@fr4nkl1yn, there's simpler solution to that problem. Just set in tasker/macrodroid to turn off the tablet once the ignition key is on the off position (charger disconnected). Bam no battery drain issue...
Click to expand...
Click to collapse
yeah, I'm going to have to do it. close apps and set airplane mode with screen off at power, and a timer to shut down after a few hours. Off_charge_mode will take care of the rest with screen, radios on at power on.
Having an add issue. the tablet is powering the charger, and the key circuit of the car, through the otg cable.
Further research shows its functioning just as it's supposed too. This is also the cause of the issues I was contributing to pem.
When the power is shut off while a otg device is connected, or the tablet thinks is connected, it doesn't sleep and powers the otg device, my charger, from the tablet. At that point it doesn't recognize any change in external power until its physically unplugged and reconnected.
Source, timur: http://mehrvarz.github.io/usb-host-mode-power-management-nexus7/
This leads me to believe pem isn't switching the fixed install trigger, or oxydo-revamp has a bug.
My xperia battery drains while it charging and in use like YouTube or texting, if it 10% so it becomes 9% and keep decreasing slowly, any help to solve it I never faced that problem before update to lollipop 5.1.1!
Same problem here man, can't play a stream nor play a small game. I've even tried switching to CM12.1, but to no avail.
How old is your phone? I'm thinking of buying a new battery.
I had the same problem, especially when I used VR goggles to play PC games(via Trinus VR app) even when USB was plugged in, after 30min of playing eg doom 3 i had drop from 70% to 40%
In normal usage, when I was watching movies and using standard Sony charger I had slower drops but still after one movie I had drop from 80% to 75% with charger plugged in...
I found only one solution for that: 2.2 A charger and 5.2V
Its damn hard to find such charger, most of them have 2 USB slots and cut half this power to every USB, but some of them give full 2.2/5,2 to every USB slot and that one is best.
BUT problem is, that such charger can really quickly mess up your battery. Phone is hot as hell, and battery can die x2 faster than using normal charger. So I use it only sometimes when watching movies.
PS also I found out that using docking station that use pins are way better and faster to charge our XZ.
Akinaro said:
I had the same problem, especially when I used VR goggles to play PC games(via Trinus VR app) even when USB was plugged in, after 30min of playing eg doom 3 i had drop from 70% to 40%
In normal usage, when I was watching movies and using standard Sony charger I had slower drops but still after one movie I had drop from 80% to 75% with charger plugged in...
I found only one solution for that: 2.2 A charger and 5.2V
Its damn hard to find such charger, most of them have 2 USB slots and cut half this power to every USB, but some of them give full 2.2/5,2 to every USB slot and that one is best.
BUT problem is, that such charger can really quickly mess up your battery. Phone is hot as hell, and battery can die x2 faster than using normal charger. So I use it only sometimes when watching movies.
PS also I found out that using docking station that use pins are way better and faster to charge our XZ.
Click to expand...
Click to collapse
I will try to use another charger maybe a Lenovo tablet charger it's ac will be more than the Sony one but it will make the battery so hot and that will ruins it fast than its normal life cycle.
SDee96 said:
Same problem here man, can't play a stream nor play a small game. I've even tried switching to CM12.1, but to no avail.
How old is your phone? I'm thinking of buying a new battery.
Click to expand...
Click to collapse
Next November it will be one year, I don't know why is that happening with me but this is annoying because I used to watch videos while it charging before sleep on bed :crying:
Sony forum also saying you should no use phone while it charging.
Sony forum also saying you should no use phone while it charging.
Click to expand...
Click to collapse
its remind me situation about battery life:
HEY! WE PUTT NFC, LTE, GPS, HUGE SCREEN, ULTRA CAMERA, 99GHz CPU 200GB RAM ON OUR DEVICES... and small battery
And when you ask someone about it: turn it off, dont use it, dissable it...
So they saying that we bought device for 300-700$ and now we need to make it dump so it can last one day... without using it...
What is the point of having eg LTE and NFC, if can use it, because my battery gonna die before I can use it...
The same here:
Modern phones have nice HD screens perfect for movies, but we cant watch anything because of... battery and amazing charging system....
Only I see that we actually are sheep's that forced manufacturer to make such phones? and now we suffer?
"This phone have shty battery... but I need phone, so I gonna buy it" and that how we roll for past 10 years....
PS, sorry for offtop
I personally think a charger with 2Ah output won't do bad things to your battery. Anything over that should simply not be used to charge the Xperia Z.
Guys I tried another Sony charger it charging good even using the phone while charging yeah it kinda slow but that better than before.
Ps smartphones are annoying :silly:
Also I forgot to mention that chargers for tablets are good to, I tried one for galaxy tab and its almost fast as 2.2A even if it have only 2A.
Most of them are the same as for phones, but some bigger one have more powerful chargers