Development on a custom kernel? - Asus Transformer TF701

Hi, I am so excited to see some more development going on with this awesome tablet!
I was wondering if anyone has thought or was planning on working on a custom kernel for this epic tablet.
You may be wondering why I care about this. Before I got this tablet, I had the tf300t and it had a pretty decent battery life on it, but when a custom kernel was flashed onto it, I was able to use an app (Setcpu) that allowed me to minimize the cpu levels when the tablet was in sleep mode and can maximize the processor when the display was turned on. I was able to change my cpu speed based on multiple setup profiles and it expanded my battery life from 1 day to 2 1/2 days.
This is just one more way we can make the tablet even better for all tf701t users. Thanks developers for all your hard work and time!
Sent from my SCH-I545 using Tapatalk 2

Related

Rediscovering SuperPower v 0.80 BETA

So I was over in the Atrix forums the other night because there was someone over there who was wanting some help deciding if they should ditch their Atrix for the Thrill 4G. The overwhelming amount of posts about some of the hitches with the Thrill were in regards to the battery consumption and the RAM getting hammered with general usage.
Over here since a bunch of us are actively doing doing what we can to try and speed the development along having being trying new things and tweaking this or that in an attempt to make some progress toward real development.
Here is a link to what I said over there:
http://forum.xda-developers.com/showthread.php?p=17448824#post17448824
So I was running back through all the apps. and such that I had used in the past on other phones and hidden in my lengthy list of apps. used to get every ounce of power out of whatever phone I was jacking with, was SuperPower. I had the paid version but it has subsequently been ditched and redone it seems and now takes the form of a BETA.
This BETA I dropped onto my Thrill and started to go through the options that are available on this version that were not there before. You can now manually go into SuperPower and tell the app. what program you want it to kill when the screen goes black, how you want wi-fi and/or radios to behave, etc. It is extremely customizable.
Until there is a custom ROM and all that for the Thrill I think we are going to have to do our best to manage the few minute undesirables this device has with things like SuperPower. So, my end result as it stands right now on battery and RAM usage, I am using a few different apps. and I will list the links below for your convenience; is after about 10 1/2 hours of fairly mid to heavy use I was sitting at about 71 % battery life. Understand I let the battery go down below 20 % then charged it back up to 100 % with no interruptions in the charging process. You should do this at least once a month just maintain good battery health and longevity anyway. Especially on powerhouse phones like the Thrill 4G.
Now when I say mid to heavy usage this is my interpretation of that; regular talk time throughout the day, 100+ text during the day, market and music downloads, 2D and 3D gaming. When it was time to charge again I was at 13 or so hours with 49 % battery still showing. Not to bad as it was blowing through battery like it was free before.
Here are the apps. I used with download links. If you have questions or anything let me know or PM me:
SuperPower BETA v 0.80(*Must be rooted by the way to use this*)
https://market.android.com/search?q=SuperPower
Chainsfire 3D(*must be rooted*)
https://market.android.com/search?q=Chainsfire&so=1&c=apps
*As a side note besides the other great benefits this app. offers what I use to help with battery usage is the Night Mode feature*
SPB Shell 3D (*This is a paid app. and worth every penny IMO. But if you are not down with dropping the change for it use LauncherPro or one of the other free Launchers out there*)
https://market.android.com/search?q=spb+shell+3d+&so=1&c=apps
Advanced Task Manager
https://market.android.com/details?id=com.arron.taskManagerFree&feature=search_result
Hotspot Guru
https://market.android.com/search?q=Hotspot+Guru&so=1&c=apps
Besides what I listed as benefits for SuperPower there are a ton more that I have not even touched on. This app is jam-packed full of modding goodness. get the app. and use at your own risk kind of thing and explore this bad boy because its a doozy. Lol! Hope this helps.
What are you doing specifically on the Superpower app to get such good battery life?
I think I am at the point that the best option....is to just return the thrill.
I tried using it as my dedicated device for a few days now and it just isnt working out. it freezes,locks up, bluetooth is not holding a connection ,just all around does not perform like I expected.
I really want to like it haha....i really like the overall physical feel of the phone. The 3d is great (after waiting a ridiculously long time for it to load) but it is just too sluggish and quirky for me to enjoy daily.
I am most likely going to start from scratch tonight and give it one more week....but without some major magical miracle (like fully working cwm, kernel development and the ability to flash O3D roms) i just dont see myself keeping the thrill.
Sent from my SAMSUNG-SGH-I997 using XDA App
00mred00 said:
I think I am at the point that the best option....is to just return the thrill.
I tried using it as my dedicated device for a few days now and it just isnt working out. it freezes,locks up, bluetooth is not holding a connection ,just all around does not perform like I expected.
I really want to like it haha....i really like the overall physical feel of the phone. The 3d is great (after waiting a ridiculously long time for it to load) but it is just too sluggish and quirky for me to enjoy daily.
I am most likely going to start from scratch tonight and give it one more week....but without some major magical miracle (like fully working cwm, kernel development and the ability to flash O3D roms) i just dont see myself keeping the thrill.
Sent from my SAMSUNG-SGH-I997 using XDA App
Click to expand...
Click to collapse
Really. Mine flies through screen's and apps with Zero Lag including 3D. As far as it sounds to me, sounds like your phone is either defective or loaded with a Ton of apps running in the background constantly. If it's apps running in the background all the time as far as I recall Froyo didn't do the greatest at managing what to shut down and when. Either way goodluck.
Thanks! As for apps...that isn't the issue for sure. There are a number of things the phone does quickly but there are a few it does not. The camera does concern me. When I open the three d can it just goes blank screen for a while and then finally comes up.
Hell even typing at times everything will occassionally just pause for a few.
I haven't given up yet. I am going to hard reset and give her one more go
malickie said:
Really. Mine flies through screen's and apps with Zero Lag including 3D. As far as it sounds to me, sounds like your phone is either defective or loaded with a Ton of apps running in the background constantly. If it's apps running in the background all the time as far as I recall Froyo didn't do the greatest at managing what to shut down and when. Either way goodluck.
Click to expand...
Click to collapse
Sent from my LG-P925 using XDA App
Try using taskiller and set it up to kill apps when the screen is off. That seems to work well for me with app management.
Sent from my LG-P925 using XDA App
taytay209 said:
Try using taskiller and set it up to kill apps when the screen is off. That seems to work well for me with app management.
Sent from my LG-P925 using XDA App
Click to expand...
Click to collapse
Personally, I have been using "Autokiller Memory Optimizer," which is NOT a task killer, but allows you to set memory limits.
This may be overly aggressive, but this is the setup I have been using, and it has been treating me very well. From top to bottom, in MB (from "foreground app" to "empty app"): 18 / 24 / 32 /100 / 125 / 150
I may tweak it down a little, but in general this setup has allowed me to multitask between apps really quickly, while Android "kills" the apps I'm no longer using. Highly recommended for (rooted) Thrill users!
While I'm at it, another useful (paid, requires root) tool for the thrill is "Autostarts."
With what I have done so far with SuperPower and such my phone is flying right along and running consistently with between 186 and 202 mb of available memory. So with the processor and RAM hauling ass I am loving this phone. I am can't wait for some some stuff to come down the pipe for this phone. There is definitely a lot of BS stuff running hidden that can slow it down but with SuperPower and the task killer and all the stuff I talked about when I started the thread I am so far satisfied.
Running mine basically how it came straight out of the box, no custom rom, only fancy apps I'm using are appkiller and setcpu right now. Battery life before I got setcpu was... less than desired. But when I got it and configured it to only use as much processor speed as I'd need for my "on the go" usage, I get enough life out of it to last me the whole day, and get home at 20% battery. What I did? Set it so it uses minimal CPU speed (30%)with the screen off, and in calls, and during normal usage it only runs at 60% and that's more than enough to handle my regular usage of texting, emails, calls, browsing, a little bit of gaming, near constant syncing, as well as a good amout of music streaming and maybe only about 50% standby time. Love this phone, dual core with half gig of ram is pretty much complete overkill as far as any phone goes. I fly through Apps only using 60% of the cpu's stock capabilities.now for the times when I'm out longer than normal (over 14 hours a day) I have it set to use minimal CPU speed at 15% battery life and less, in case of emergencies.
I'm returning mine. I either put too many apps, get too many defective phones, or just need a phone with more memory. Never had running out of application room on the Captivate or Inspire.
Camera can take up to 8-10 seconds to finally come on. This is a pain when I want some quick shots of the kids at the moment.
Mine also freezes up while I'm using the keyboard whether it's the stock or swiftkey or better keyboard. This is the 2nd thrill I've had and same issues. So that leaves pretty much the GS2 that's coming out. And Samsung scares me.
Until we get a custom kernel.....i am not aware of anything that will allow us too throttle cpu speed. what are you using? sure the apps will allow you to make setting adjustments yes....but those settings are not sticking (not on the apps I have tried)
irishpunk said:
Running mine basically how it came straight out of the box, no custom rom, only fancy apps I'm using are appkiller and setcpu right now. Battery life before I got setcpu was... less than desired. But when I got it and configured it to only use as much processor speed as I'd need for my "on the go" usage, I get enough life out of it to last me the whole day, and get home at 20% battery. What I did? Set it so it uses minimal CPU speed (30%)with the screen off, and in calls, and during normal usage it only runs at 60% and that's more than enough to handle my regular usage of texting, emails, calls, browsing, a little bit of gaming, near constant syncing, as well as a good amout of music streaming and maybe only about 50% standby time. Love this phone, dual core with half gig of ram is pretty much complete overkill as far as any phone goes. I fly through Apps only using 60% of the cpu's stock capabilities.now for the times when I'm out longer than normal (over 14 hours a day) I have it set to use minimal CPU speed at 15% battery life and less, in case of emergencies.
Click to expand...
Click to collapse
Sent from my SAMSUNG-SGH-I997 using XDA App
I'm using the xda app setCPU it's a free download for site members and only requires rooting your phone. Note that the app only controls the max and min speeds of the processor, this isn't overclocking. I don't really know that much about the app beyond what it's supposed to, and seemingly succeeding at doing. Everything that I've done with the app seems to be working fine. I tested it with min and max at only 30% CPU speed (the lowest it seems to allow for), and I definitely felt it in the way my phone responded, the entire time (atleast ten mins) up til I turned the settings back up
00mred00 said:
Until we get a custom kernel.....i am not aware of anything that will allow us too throttle cpu speed. what are you using? sure the apps will allow you to make setting adjustments yes....but those settings are not sticking (not on the apps I have tried)
Sent from my SAMSUNG-SGH-I997 using XDA App
Click to expand...
Click to collapse
Sent from my LG-P925 using XDA App
I will play with it again but i recall it doing nothing. it looks like the settings have been changed but they do not stick. Running a few benchmarks showed processor still running at full speed
I did a factory reset...will play with it when i get everything loaded up again.
irishpunk said:
I'm using the xda app setCPU it's a free download for site members and only requires rooting your phone. Note that the app only controls the max and min speeds of the processor, this isn't overclocking. I don't really know that much about the app beyond what it's supposed to, and seemingly succeeding at doing. Everything that I've done with the app seems to be working fine. I tested it with min and max at only 30% CPU speed (the lowest it seems to allow for), and I definitely felt it in the way my phone responded, the entire time (atleast ten mins) up til I turned the settings back up
Sent from my LG-P925 using XDA App
Click to expand...
Click to collapse
Sent from my SAMSUNG-SGH-I997 using XDA App
Haven't done any benchmark tests, my conclusion just came based on the results of improved battery
life to be completely honest.
Sent from my LG-P925 using XDA App
SuperPower can throttle it up a bit. It is one of the settings to be checked off.
Open up SuperPower>scroll down to: CPU Scaling: Enable and check the box
Below that is a box you can check for CPU Scaling: ondemand
Like I said in my original post there are a fair amount of options that gives us the opportunity to have our devices running at their best. I appreciate everyone's postings about what they are trying and so forth. This is how it all begins to getting stuff done. Thanks guys.
Not a problem my good friend, I'm a huge fan of this device and the potentials it possess, I am glad to be a part of any improvements that can be made.
Sent from my LG-P925 using XDA App
I am a goon...underclock works perfectly fine
Sent from my LG-P925 using XDA App
I'm glad you got it working, how's it helping you're battery life?
yeah ironic I know, a die hard Android fan like myself, doing iPhone AppleCare phone support.
47r0n1n said:
SuperPower can throttle it up a bit. It is one of the settings to be checked off.
Open up SuperPower>scroll down to: CPU Scaling: Enable and check the box
Below that is a box you can check for CPU Scaling: ondemand
Like I said in my original post there are a fair amount of options that gives us the opportunity to have our devices running at their best. I appreciate everyone's postings about what they are trying and so forth. This is how it all begins to getting stuff done. Thanks guys.
Click to expand...
Click to collapse
I can't find this settings under super power? Do I need to have a paid version of this app?
---------- Post added at 03:50 PM ---------- Previous post was at 03:50 PM ----------
irishpunk said:
I'm glad you got it working, how's it helping you're battery life?
yeah ironic I know, a die hard Android fan like myself, doing iPhone AppleCare phone support.
Click to expand...
Click to collapse
Can you post your setcpu settings?
I'm running my CPU at 600000mHz max and 300000mHz min for normal use, and babe a profile that sets it to 300000mHz max and min with the screen off. Have all my profiles set for "on demand" so it only ramps up the CPU when it needs it
yeah ironic I know, a die hard Android fan like myself, doing iPhone AppleCare phone support.

Nexus 7 battery life

Hi I have recently purchased a 32gb nexus 7 and I have been having some issues with the battery since the 4.2.1 update, before this update I would get around a day on the battery no problem now I can't seem to get more than 16 hours at the most. My usage includes facebook at night for roughly 2 hours, moderate gaming during the day, and some web browsing in my spare time. All this was never a problem on 4.1 but in 4.2, the battery just seems redundant. I would like to hear your thoughts on your battery life on your nexus 7's thank you.
Sent from my Nexus 7 using xda app-developers app
How much gaming is moderate?
I noticed my governor was on interactive tonight, which was maxing the CPU even just by touching the screen, I thought my battery life seemed quite good though.
Anyway, I changed my governor to ondemand, and noticed that simply touching the screen only moves the CPU freq to 3-500mhz.. Which is fine for browsing etc... I have also played games, and I haven't noticed any lags... yet... But if there is a really hungry game that I do start to notice a lag in, I'll just put it back to interactive for that game, and meantime I should have better battery life.
Like I said, I only just changed this, so I'm yet to see how much better my battery does, but just from looking at CPU freqs I'd say there's gotta be a decent difference.
There's an idea for an app for some dev... Per app governer setting...
Sent from my Nexus 7 using Tapatalk HD
I always had excellent battery life, no matter which android version.....
Do you use Google Currents? If not, stop the service and disable it completely.
Furthermore, please post a screenshot of your battery usage.
Sent from my HTC Desire using xda premium
dalanik said:
I always had excellent battery life, no matter which android version.....
Click to expand...
Click to collapse
That's pretty damn impressive. How much screen on time is that?
On my second charge I got ~2.5d with about 4-5 hours of screen on (stock). More than satisfactory!
jasopan said:
That's pretty damn impressive. How much screen on time is that?
On my second charge I got ~2.5d with about 4-5 hours of screen on (stock). More than satisfactory!
Click to expand...
Click to collapse
Looks like 0 screen on to me, device is sitting idle. Mine would last weeks from what I've seen in standby, but yeah, I use my Nexus 7...
knuckles1978 said:
How much gaming is moderate?
I noticed my governor was on interactive tonight, which was maxing the CPU even just by touching the screen, I thought my battery life seemed quite good though.
Click to expand...
Click to collapse
Default governor is intended to max the CPU when you touch the screen, in fact it's an advertised feature for the Nexus 7. There could perhaps be a step up to a higher CPU then higher yet if needed, but the problem with that is you get jumpiness if you switch CPU speeds around when things are going on, like launcher swipes, games, etc.
Per-app governor is already easily done today in Tasker.
Aw man
MatDrOiD said:
Do you use Google Currents? If not, stop the service and disable it completely.
Furthermore, please post a screenshot of your battery usage.
Sent from my HTC Desire using xda premium
Click to expand...
Click to collapse
Hell naw, just set it to only sink on charge
That means I update my articles in the morning and evening only, and whenever else I plug it in.
khaytsus said:
Per-app governor is already easily done today in Tasker.
Click to expand...
Click to collapse
Thanks for that, I'll check it out. There is no performance loss when web browsing or similar tasks with the on demand, so I'll just use interactive for intensive games, and extend my battery a bit in that case.
Sent from my Nexus 7 using Tapatalk HD
Sent from my Nexus 7 using xda app-developers app
No I do not use Google currents at all, I can't understand how people get so much battery from it whereas I get hardly anything
Sent from my Nexus 7 using xda app-developers app
khaytsus said:
Looks like 0 screen on to me, device is sitting idle. Mine would last weeks from what I've seen in standby, but yeah, I use my Nexus 7...
Click to expand...
Click to collapse
I was like 2 hours usage total. I used it only to check my mail and write some replies, check news and such...
khaytsus said:
Per-app governor is already easily done today in Tasker.
Click to expand...
Click to collapse
Well, I'm now a happy guy.
Downloaded tasker. I now have my pad set on ondemand for browsing and light duties only with a 1ghz cap which I cannot tell any difference from stock clock,, and then when I launch any intensive games I have tasker automatically overclocking to 1.5Ghz, changing governor to interactive and closing some stuff letting my pad concentrate on the job in hand without me having to do a single thing. Then when I exit my game, tasker automatically clocks back down again and puts the governor back to ondemand.
I also have it automatically only use Sync if the battery is above 40%. I'm liking tasker, and these are only very simple uses for it, some of the example ones are really cool. @khaytsus Thanks again for telling me about it, wouldn't have known otherwise. Now I want to get more into it and seeing what it can really do using the variables etc, and the appmaker.
Another thing about battery. I got my n7 as a US import to the UK, and just noticed today that the charger they supplied me was 700mA instead of 2A,, so I went and bought a UK to US adaptor so I could use the ASUS OEM one, and its charging loads faster, should be nearly 3 times and so far it does seem it. If I was playing a game while charging, say Vice City, before I was able to actually make my N7 lose charge. Not now. So anyone with the slow charge problem please just double check your charger, just in case,, there's probably someone else out there like me that just didn't bother looking and is using a 700mA one.
Sent from my Nexus 7 using Tapatalk HD
Timed from 0% with the 2A charger. 2 hours from empty tank. That's more like it
Sent from my Nexus 7 using Tapatalk 2
Wow! That was fast! Mine is 3 hours on the stock 4.2 rom and kernel..
Sent from my Nexus 7
This is my battery life running latest CM 10.1 nightly and latest Franco kernel.
Sent from my Nexus 7 using Tapatalk 2
Nice. I'm assuming there wasn't much gaming in your 8hrs of screen time. Still great battery life though. As long as I can do anything I like in the space of a day and be sure that I'm not going to run out then I'm happy.
I am still thinking of investing in one of those 10 or 12,000mAh battery packs though, just for times where I have to leave the house and haven't had the time to give it a full charge.
http://www.amazon.co.uk/EasyAcc-12000mAh-Portable-External-Battery/dp/B008YRG5JQ/ref=pd_sim_sbs_ce_2
http://www.amazon.co.uk/RAVPower®-D...Smartphones/dp/B00974FC2G/ref=pd_sim_sbs_ce_5
Sent from my Nexus 7 using Tapatalk 2
I do not do a lot of gaming. Mostly browsing the web and reading forums. I am very satisfied with life like that for my uses.
Sent from my Nexus 7 using Tapatalk 2
Stock 4.2.1, m-kernel' cpu1.3; gpu526; LP666. 6 hours of screen on time minimum. Just daily use, with light gaming ( safari ski, etc).
Sent from my Nexus 7 using xda app-developers app
ajrich80 said:
I do not do a lot of gaming. Mostly browsing the web and reading forums. I am very satisfied with life like that for my uses.
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
what's your Franco kernel setup?
Sent from my Nexus 7
My n7 with franco kernel r38 I get around 10-11 hours screen on time if I can keep off gta3

[Q] LG Optimus 4x HD(TEGRA 3) vs Motorola Atrix HD

Which one is better in real world gaming/calling/battery life/3g brwsing/gpu/cpu performance customs roms, more easy to overclock best quality phone?
Atrix HD's battery is crap. As far as gaming, some non-tegra games might run better on the Atrix because of the optimization with Adreno GPU's. Take for example MC4. It has hiccups when i play it on my O4X, but it is buttery silky smooth on my Nexus 4. There are no custom roms available for the O4X because of a locked bootloader...therefore no way to overclock yet. Unless you're a kernel dev that could help in that category.
If you're looking to buy a phone and you development is a big deal for you, then go with the Atrix HD. If you don't care about development and just want a solid phone that you can count on, then the O4X is a wiser choice. I honestly don't feel like i have the need for overclocking or custom roms. Just like my Nexus 4. There are tons of custom roms and mods available for it, but i prefer to run it bone stock but with a custom kernel.
babymatteo said:
Atrix HD's battery is crap. As far as gaming, some non-tegra games might run better on the Atrix because of the optimization with Adreno GPU's. Take for example MC4. It has hiccups when i play it on my O4X, but it is buttery silky smooth on my Nexus 4. There are no custom roms available for the O4X because of a locked bootloader...therefore no way to overclock yet. Unless you're a kernel dev that could help in that category.
If you're looking to buy a phone and you development is a big deal for you, then go with the Atrix HD. If you don't care about development and just want a solid phone that you can count on, then the O4X is a wiser choice. I honestly don't feel like i have the need for overclocking or custom roms. Just like my Nexus 4. There are tons of custom roms and mods available for it, but i prefer to run it bone stock but with a custom kernel.
Click to expand...
Click to collapse
How`s battery life on O4X? and cpu performace tegra 3 vs "krait" S4?and for updating android which one has more support for updates?, what you mean with solid? and what happens if in the future O4X doesnt support new Android systems? bcuz it has locked bootloader so I cant install new custom roms?
Battery life on the O4X is decent. I get a whole day's worth with medium use. As far as Tegra 3 vs Q Krait S4 im sure there are plenty of video comparisons on youtube you can check out. As far as updates are concerned, since Motorola has been bought by Google you can count on the Atrix HD to receive its updates faster than the O4X. And because the O4X has a locked bootloader, there will be no custom roms to fulfill your flashaholic needs. That is until we get some devs who are willing to work on the phone. But until that time comes, if you're a flashaholic...go for the Atrix HD.
When i said a solid phone, i meant that the phone doesn't have any bugs or anything...so you can always count on it on being available for you to use.
someone else with some more useful info?
My 4X only laggs on games like MC4/gtaVC when i set the cpu under 1200mhz
Edit: and games run silk smooth on 1500 with performance setting
Sent from my LG-P880 using xda app-developers app
alekthefirst said:
My 4X only laggs on games like MC4/gtaVC when i set the cpu under 1200mhz
Edit: and games run silk smooth on 1500 with performance setting
Sent from my LG-P880 using xda app-developers app
Click to expand...
Click to collapse
what about gamming and battery life?
Battery life: i tested, and my phone will easily standby 500+ hours(in airplane mode, with 3g activated, no data: it failed after the half. About 250-280 hrs.) When constantly gaming Dead Space (only game i tested the actual time on) it lasted 2 hrs 07 minutes on full performance mode. Again with no lag whatsoever(dead space wont lag on a optimus 2x or ever weaker phones though)
I did test on a older version of Counter Strike aswell(i found it the apk on my pc. Cant remember where i got it from) - and it did start lagging when i took it on a match with me and 15 AI`s (that is, 15 guys controlled by the phone) there my battery lasted 3+ something hours (from 100%) before i got the 5% warning.
Sent from my sexy and powerful LG-P880 using xda-developers app
Could probably point out that while the battery life while gaming is a bit short - when I've tested it, it's been on average a full hour better than the competing quad-core phones when running the same game side by side.. not completely sure why that happens when comparing it to other tegra 3 phones, though.. Assuming it has something to do with the scheduler policy, along with the slightly larger battery, or something of that sort. Aside from that.. a snapdragon setup uses more power on average, and idles on a massively higher power-draw. Always been a problem with those soc designs - that the antennas and modules need to be powered on completely when there's power on the phone at all. Btw - really did manage to have the 4x run 11 days while online on the gsm network once. Didn't use the phone much - but it really is easy to get the phone to last three-four days if you don't run anything heavy. And by heavy, I don't mean just editing photos, or having the screen lit up, or something like that. I mean something that constantly runs on full processor load.
Power-draw while just playing back music and movies as well is top class. You don't read that in the reviews for some inexplicable reason.... having to do with Engadget being in love with Apple, to the point where they hate on anything that threatens to dethrone their precious princess or something. But it's still the case. This tegra 3 chip with an ips screen/gorilla glass, slim chassis w/replaceable battery/memory card slot - is a very neat design.
What? The power draw when playing music is the only thing that let me down when using this phone! Even my old xperia x8 could do better!
Sent from my LG-P880 using xda app-developers app
I meant compared to other modern smartphones
Could put it this way - if you want support for lossless formats, dynamic bitrate, ogg, that sort of thing - then this is the most effective system by far. Since you have power management that is transparent to the OS, and so on, so you can use existing media-players with support for the arm set and get good performance on low clocks/only the companion core, etc.
UIQrules said:
I meant compared to other modern smartphones
Could put it this way - if you want support for lossless formats, dynamic bitrate, ogg, that sort of thing - then this is the most effective system by far. Since you have power management that is transparent to the OS, and so on, so you can use existing media-players with support for the arm set and get good performance on low clocks/only the companion core, etc.
Click to expand...
Click to collapse
Tested; none of the (free) media players on google play could be run on the companion core. They seem to always run on the 3rd(core2) 1.5ghz core. Putting the freq at a stable 1.1ghz when screen off. And pumping to the full 1.5 when the screen is on...
Not very power saving...
Sent from my LG-P880 using xda app-developers app
Hm.. The ones using the arm 7 vfp packs should avoid that. Bsplayer does, at least.. The internal player as well. Same codec pack. The Spotify app actually avoids running on the other cores as well. That instruction set class is not unique for tegra3 either, so it should be fairly commonly used by now.
and getting a higher battery in mAh would help? which models uses O4XHD?
PontiacGTX said:
and getting a higher battery in mAh would help? which models uses O4XHD?
Click to expand...
Click to collapse
mAh reflects the storage capacity. Getting the double amount of mAh will basically double your battery life
The only other than the stock battery known to me, must be the mugen powers battery extender-something like that. And that will make your phone look like a brick.
Sent from my LG-P880 using xda app-developers app

I have a question please help and answer

I flashed the Franco kernel on my nexus 7 to increase my battery life and performance then when I went into ROM tool box I noticed the min frequicy was 244 megahertz 144 different than stock I went back the the original kernel right after could this have damaged me CPU and shorted the life on my device I only had the kernel for a few hours
Please answer
Sent from my Nexus 7
http://forum.xda-developers.com/showthread.php?t=2121649
I don't see how that helps
Sent from my Nexus 7
No it wouldn't ruin your device. I keep my min CPU at 380 something amnd never had any problems
Sent from my Nexus 7 using xda premium
Thank you I worry to much
Sent from my Nexus 7
Whaleshark345 said:
I flashed the Franco kernel on my nexus 7 to increase my battery life and performance then when I went into ROM tool box I noticed the min frequicy was 244 megahertz 144 different than stock I went back the the original kernel right after could this have damaged me CPU and shorted the life on my device I only had the kernel for a few hours
Please answer
Sent from my Nexus 7
Click to expand...
Click to collapse
No, and the reasoning is nonsense. A processor is not going to be damaged because it is performing too slowly, given that it will (ideally) spend most of its time at ~0MHz anyway (deep sleep). The only way you're going to damage your onboard hardware is if you start messing with the voltage and clock speed in the upward direction.
If you underclock your processor, then your tablet gets slower (obviously). Since the Franco kernel adjusts the minimum frequency, though, this only affects how the tablet behaves when it's idle, but not quite asleep (generally after the screen is dim and you haven't touched it for a while). Keep in mind that the maximum frequency will still be significantly above this, meaning that it's not like the adjusted lower bound is going to make the processor faster than it does during normal use.
If you undervolt your processor, then there's the chance that you'll mess up and the device will power off because it's not getting enough power to run the processor. At that point, the next reboot will generally put voltage settings back to normal (assuming you haven't set your voltage on boot), and even if you did, you can just reflash the kernel (again with no harm to the device).
If you overvolt or overclock your device, battery life will (potentially) get shorter (but not necessarily battery capacity), the device will run a little hotter, and a little faster. You can also fry your board. However, very few kernels get posted here that allow the processor to get anywhere near those states (unless you basically purposefully try to kill your board), and the processor itself has physical safeguards that will shut things down/throttle speed if you're in danger.
Whaleshark345 said:
I don't see how that helps
Sent from my Nexus 7
Click to expand...
Click to collapse
They were suggesting that you wipe your old kernel completely and flash again. Not really that important.
And next time ask questions in the Q&A section. That's what it's there for.
Sent from my Nexus 7 using Tapatalk HD
veeman said:
And next time ask questions in the Q&A section. That's what it's there for.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
And actually use a proper title rather than the lazy and nondescriptive "I have a question." No kidding?!
Sent from my SCH-I545 using Tapatalk 4 Beta

[Q] Best ROM/Kernel combination for battery life?

Hello World! What's your current ROM and kernel you're running on, and what do you normally get for screen on time? I'd like to get some suggestions.. Would like to get through a whole day comfortably
It doesn't really matter how much screen on time someone else gets, it doesn't mean you'll ever achieve that same amount. Screen uses a pretty constant amount of power per brightness setting, but the other things that use power will take away from that and not all those things are to do with CPU usage, which is the only thing a ROM/Kernel can affect.
On top of which:
"Best" ROM.
There is no such thing as a best ROM. The question itself is ambiguous. "Best" is obviously a subjective term.
What I want from a ROM may well differ from what you want from a ROM, ergo - what is best for me could be worst for you.
If you are asking what the most popular ROMs are, or which ROMs people are using, you can see which threads stay around on the first few pages (and have the most posts) in the Android Development or Original Android Development forums. You can also see what other people are running by reading the What are you running on your Nexus 5 thread.
If you are asking which is the most stable, being a Nexus device - they're all pretty stable.
If you are asking which is best on Battery, ROMs only affect battery if they have a feature that is badly coded. You will likely be able to read about this in the ROM threads. ROMs do not impact battery life. The only impact to battery life are your apps, your settings, how you use the phone and mostly, environmental issues such as Phone Signal.
For tips about improving battery life, please read [Battery Life Help] Troubleshoot battery issues here!
"Best" Kernel
There is no such thing as the "Best" kernel. What we all want from a kernel is different. Again, many people have the misconception that Kernels affect battery life. Let's get this cleared up. Although Kernel devs will build in optimisations and efficiencies that will improve battery life, these are very, VERY tiny...and if 1 kernel has these optimisations, they likely all have.
People will often say "Kernel x is better than kernel y for battery life". This is actually wrong. Kernels respond to user settings. Setting up the governor to favour either battery life or performance is simple enough to do, you just have to do some learning. The reason people think Kernel x is better than y is because developers set their kernels up with their preferred governor settings. This is what we refer to as out-of-the-box settings. The out-of-the-box settings for kernel x may well produce better battery results than the out-of-the-box settings for kernel y, which favour performance. The fact is, you as the user have the ability to tune kernel x or y to perform the same, be that battery or performance - so start learning how to do this yourselves - that way, you can choose the kernel based on the FEATURES you want, and not the fictional performance benefits of one kernel over another.
Hope this helps
rootSU said:
It doesn't really matter how much screen on time someone else gets, it doesn't mean you'll ever achieve that same amount. Screen uses a pretty constant amount of power per brightness setting, but the other things that use power will take away from that and not all those things are to do with CPU usage, which is the only thing a ROM/Kernel can affect.
On top of which:
"Best" ROM.
There is no such thing as a best ROM. The question itself is ambiguous. "Best" is obviously a subjective term.
What I want from a ROM may well differ from what you want from a ROM, ergo - what is best for me could be worst for you.
If you are asking what the most popular ROMs are, or which ROMs people are using, you can see which threads stay around on the first few pages (and have the most posts) in the Android Development or Original Android Development forums. You can also see what other people are running by reading the What are you running on your Nexus 5 thread.
If you are asking which is the most stable, being a Nexus device - they're all pretty stable.
If you are asking which is best on Battery, ROMs only affect battery if they have a feature that is badly coded. You will likely be able to read about this in the ROM threads. ROMs do not impact battery life. The only impact to battery life are your apps, your settings, how you use the phone and mostly, environmental issues such as Phone Signal.
For tips about improving battery life, please read [Battery Life Help] Troubleshoot battery issues here!
"Best" Kernel
There is no such thing as the "Best" kernel. What we all want from a kernel is different. Again, many people have the misconception that Kernels affect battery life. Let's get this cleared up. Although Kernel devs will build in optimisations and efficiencies that will improve battery life, these are very, VERY tiny...and if 1 kernel has these optimisations, they likely all have.
People will often say "Kernel x is better than kernel y for battery life". This is actually wrong. Kernels respond to user settings. Setting up the governor to favour either battery life or performance is simple enough to do, you just have to do some learning. The reason people think Kernel x is better than y is because developers set their kernels up with their preferred governor settings. This is what we refer to as out-of-the-box settings. The out-of-the-box settings for kernel x may well produce better battery results than the out-of-the-box settings for kernel y, which favour performance. The fact is, you as the user have the ability to tune kernel x or y to perform the same, be that battery or performance - so start learning how to do this yourselves - that way, you can choose the kernel based on the FEATURES you want, and not the fictional performance benefits of one kernel over another.
Hope this helps
Click to expand...
Click to collapse
Yup that does help... No such thing as 'best'. I didn't make the best title lol.. Currently happy with SlimLP and Franco, just wondering what you guys were getting . What are you on, as of now in terms of ROM/Kernel?
samdroid24 said:
Yup that does help... No such thing as 'best'. I didn't make the best title lol.. Currently happy with SlimLP and Franco, just wondering what you guys were getting . What are you on, as of now in terms of ROM/Kernel?
Click to expand...
Click to collapse
Slim + ElemantalX
samdroid24 said:
Hello World! What's your current ROM and kernel you're running on, and what do you normally get for screen on time? I'd like to get some suggestions.. Would like to get through a whole day comfortably
Click to expand...
Click to collapse
I hate the "it all depends on your phone, each one is different" bullcrap. That may be true to an extent, but some combos are generally going to be better than others. Besides, most people who ask this question just want to know what people are using and what is working for these people. So now that my rant is over, I'm using BrokenOS with Sensei Kernel R52. I'm getting roughly 4-5 hour SOT with roughly 50-60% brightness and 18 hours off the charger. I'm using the blacked out gapps that are linked with BrokenOS and using the black Swiftkey keyboard theme. All of the black saves battery when the screen is on because those pixels are off when using amoled screens. Don't know if you know that or not, but hey, it's there. Also, I've set the kernel minimum frequency to 223mhz using intelliplug with fsync and mpdecision off using the trickstermod app. I've set the scheduler to fiops and changed the read ahead value to 1024. This has consistently given me these results which I consider to be great! Hope that helps!
ccoulterjg1 said:
I hate the "it all depends on your phone, each one is different" bullcrap. That may be true to an extent, but some combos are generally going to be better than others. Besides, most people who ask this question just want to know what people are using and what is working for these people. So now that my rant is over, I'm using BrokenOS with Sensei Kernel R52. I'm getting roughly 4-5 hour SOT with roughly 50-60% brightness and 18 hours off the charger. I'm using the blacked out gapps that are linked with BrokenOS and using the black Swiftkey keyboard theme. All of the black saves battery when the screen is on because those pixels are off when using amoled screens. Don't know if you know that or not, but hey, it's there. Also, I've set the kernel minimum frequency to 223mhz using intelliplug with fsync and mpdecision off using the trickstermod app. I've set the scheduler to fiops and changed the read ahead value to 1024. This has consistently given me these results which I consider to be great! Hope that helps!
Click to expand...
Click to collapse
That helps greatly! Yes, this question was more of a 'Which ROM/Kernel is the best for you' type of question. And yup, I do know that AMOLEDs give you those pitch black blacks, which is good for battery, since those pixels aren't being used. I myself, am a big flashaholic, tried at least 5-6 Roms and a bunch of kernels.. Best battery life so far for me seems to be Slim + Franco.. Never tried BrokenOS, will flash tonight Thx a lot for your detailed response :good:
ccoulterjg1 said:
I hate the "it all depends on your phone, each one is different" bullcrap. That may be true to an extent, but some combos are generally going to be better than others. Besides, most people who ask this question just want to know what people are using and what is working for these people. So now that my rant is over, I'm using BrokenOS with Sensei Kernel R52. I'm getting roughly 4-5 hour SOT with roughly 50-60% brightness and 18 hours off the charger. I'm using the blacked out gapps that are linked with BrokenOS and using the black Swiftkey keyboard theme. All of the black saves battery when the screen is on because those pixels are off when using amoled screens. Don't know if you know that or not, but hey, it's there. Also, I've set the kernel minimum frequency to 223mhz using intelliplug with fsync and mpdecision off using the trickstermod app. I've set the scheduler to fiops and changed the read ahead value to 1024. This has consistently given me these results which I consider to be great! Hope that helps!
Click to expand...
Click to collapse
Each phone is different but that really has nothing to do with battery life, except that maybe some CPU's can undervolt more. I'm not sure anyone has given this "bullcrap" answer you eluded to.
samdroid24 said:
That helps greatly! Yes, this question was more of a 'Which ROM/Kernel is the best for you' type of question. And yup, I do know that AMOLEDs give you those pitch black blacks, which is good for battery, since those pixels aren't being used. I myself, am a big flashaholic, tried at least 5-6 Roms and a bunch of kernels.. Best battery life so far for me seems to be Slim + Franco.. Never tried BrokenOS, will flash tonight Thx a lot for your detailed response :good:
Click to expand...
Click to collapse
Check out my rom chroma. Franco kernel is preloaded. Huge update coming very soon.
Sent from my Nexus 6 using Tapatalk
I've tried most of the roms and kernels and have always gone back to BlissPop and either Lean or Francos. BlissPop for the features and Lean/Franco for the battery life. I would consider myself a moderate to heavy user and get between 4 - 5 hours of sot, but more important to me, I start my day at 5am and shutdown around 10:30 - 11:00 pm and I generally have 35% - 40% or so left. Of course your milage may vary, I also greenify what I can, but I refuse to lose any features i use, why have a fantastic phone and cripple it. I generally don't change any of the kernels, except maybe set it to conservative, I've had issues in the past undervolting, but thats just me. For the slight battery savings I don't find it does that much. Again, my opinion.
Just take a nandroid of where you are and try some combinations. Give it a few days to settle in. Repeat until your happy with the combination.
zephiK said:
Check out my rom chroma. Franco kernel is preloaded. Huge update coming very soon.
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
Will most definitely flash Chroma... Looks like one of the best designed ROMs.. Will flash it either tonight or tomorrow morning... And your name seems familiar from the numerous pages I've went through on Franco's Kernel lol. Thx :laugh:
how many hour is stay on the stock ROM ?
Chroma with FK and vomer are poetry in motion. Use it and prosper.
using the rom that i use, and kernel, and the way i set up my cpu, i see between 5.5 and 7 hours sot. which rom and kernel? try them all out, find your best rom/kernel.
dan04103 said:
Chroma with FK and vomer are poetry in motion. Use it and prosper.
Click to expand...
Click to collapse
Glad you're enjoying the combination
zephiK said:
Glad you're enjoying the combination
Click to expand...
Click to collapse
Does Chroma have omniswitch? Cause that's a deal breaker
Just flashed Chroma... This ROM is buttery smooth
Sent from my Nexus 6 using XDA Free mobile app
I am on Terminus currently with Franco Kernel undervolted all frequencies @-50 which is 100% stable in my case. -75 crashes on games and/or benchmarks. My Snapdragon has a PVS 5 binning.
samdroid24 said:
Just flashed Chroma... This ROM is buttery smooth
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
I'm glad you enjoy it. A new build was pushed out if you didn't get it, 01/24.
jiv101 said:
Does Chroma have omniswitch? Cause that's a deal breaker
Click to expand...
Click to collapse
Nope, I personally don't find the feature useful.
Sent from my Nexus 6 using Tapatalk
Right now I'm on validus ROM with Franco kernel. I only changed the max clock in Franco kernel down to 2.2ghz. Right now I'm at almost 36 hours on time and 4 hours and 40 minutes sot
zephiK said:
I'm glad you enjoy it. A new build was pushed out if you didn't get it, 01/24.
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
Yup, flashed the 1/24 build last night

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