[Q] light in the buttons? - Galaxy Tab Q&A, Help & Troubleshooting

Is there any way to control button light, it would be great to have them on when using the device in the dark. Maby a way to change the timeout or somthing.

+1... also BLN (backlight notifications) wouls be a really nice addition...

+anudder 1. Been thinking the same since I got mine. Always hit the wrong button, since I'm so used to my EVO. Would be great if they slapped the retina so I'd pay more attention! Thanks for posting!
Sent from my PC36100 using XDA App

2token2 said:
Is there any way to control button light, it would be great to have them on when using the device in the dark. Maby a way to change the timeout or somthing.
Click to expand...
Click to collapse
echo -n 255 > /sys/class/leds/button-backlight/brightness
anything but 255 turns it off
cheers

Does not really help, it.s reset after 8 sec or somthing any way, but thanx, nice try.
Sent from my GT-P1000 using XDA App

2token2 said:
Does not really help, it.s reset after 8 sec or somthing any way, but thanx, nice try.
Sent from my GT-P1000 using XDA App
Click to expand...
Click to collapse
Thats because there is some Samsung's code to turn it off after a while. Cant do anything about that.

what about a quick app to cycle that whenever the screen is on?

drksilenc said:
what about a quick app to cycle that whenever the screen is on?
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Click to collapse
That could work, but it will eat cpu time and battery.

Technomancer said:
That could work, but it will eat cpu time and battery.
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Click to collapse
any idea how this would work? i am able to write small programs in jva but not more than that!

Landroid said:
any idea how this would work? i am able to write small programs in jva but not more than that!
Click to expand...
Click to collapse
It would have to be a service probably with small JNI module.
Let it sleep for button light timeout-1 seconds, and then check state of lcd brightness and if it is nonzero, set button brightness to 255. repeat forever.
There is also define KEY_LED_CONTROL in the kernel in drivers/input/touchscreen/qt602240.c. So I think it should have all worked in the kernel but somehow it doesn't. Maybe it could be possible to fix it all in the kernel.
PS. I have analyzed the code in the kernel. All it does is to handle /sys/class/leds/button-backlight/brightness so it is up to user-space to turn the buttons on and off.
Interestingly, there is some unused code that suggest it should be possible to turn the 4 leds on/off individually but there is no user space inteface for that and the init code sets them to lowest brightness.

I guess we got lucky http://forum.xda-developers.com/showthread.php?t=917441
That should work on the tab too.

Doesn't work on my ATT tab.

Does not work on my tab. :-(

Technomancer said:
PS. I have analyzed the code in the kernel. All it does is to handle /sys/class/leds/button-backlight/brightness so it is up to user-space to turn the buttons on and off.
Interestingly, there is some unused code that suggest it should be possible to turn the 4 leds on/off individually but there is no user space inteface for that and the init code sets them to lowest brightness.
Click to expand...
Click to collapse
The relly exellent thing would be to be able to have the ligts at lhe lowest brigtness.
Sounds promesing.
/ToKeN

I got in the habbit of scrolling the screen a little when i need the buttons , that turns the button lights on.
There is a chance that these lights are controlled by the code in bootloader, because when i flashed 1000l firmware , it almost bricked my tab, there was nothing on the screen, not even the trinagle, but i think i saw these lights come on, i could be wrong though.

Related

[Q] Backlight App?

Hi:
Is there any app like Lumos (http://forum.xda-developers.com/showthread.php?t=450318) for Android?
I tried searching, but all I kept running into was Lumos flashlight app lol.
I also tried auto backlight for android, and am coming up with nothing.
The auto backlight on Captivate doesn't seem to dim low enough in low light settings for my taste.
Thanks!
Yes! I was thinking the same thing. Subscribed.
http://forum.xda-developers.com/showthread.php?t=772672
Check this out. I tried it on my captivate with no luck....got stuck in boot loop....had tp flash stock. Give it a try.
aceman0455 said:
http://forum.xda-developers.com/showthread.php?t=772672
Check this out. I tried it on my captivate with no luck....got stuck in boot loop....had tp flash stock. Give it a try.
Click to expand...
Click to collapse
That is an app to make the button lights work as notifications. I am looking for something that will auto adjust the actual screen backlight, but not the stock auto backlight.
cincy1020 said:
That is an app to make the button lights work as notifications. I am looking for something that will auto adjust the actual screen backlight, but not the stock auto backlight.
Click to expand...
Click to collapse
Gotchya my bad.

[Q] LCD Brightness Up/Down Spontaneously

At random my lcd brightness will go up and down like it's having a seizure. I have tried auto brightness on and off, and with the power saving feature on and off. It's not a bid deal because it usually goes away quickly, but I would like to know if anyone else has it.
here's a video of the problem-
Mine will at times just randomly change itself for no reason and i will have to go back into the menu and adjust it again.
It only happens every once in a while but it is still annoying.
Similar but not the same. Anyone can help us?
Sent from my GT-I9000M using XDA App
INeedYourHelp said:
At random my lcd brightness will go up and down like it's having a seizure. I have tried auto brightness on and off, and with the power saving feature on and off. It's not a bid deal because it usually goes away quickly, but I would like to know if anyone else has it.
Click to expand...
Click to collapse
You sure that it is not simply the dropdown menu bar at the top? It changes your brightness by keeping your finger on it.
MadBob said:
You sure that it is not simply the dropdown menu bar at the top? It changes your brightness by keeping your finger on it.
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Click to collapse
It starts when I'm not even touching the screen. It goes up and down, up and down, et. It's becoming more frequent now. I guess my lcd is dying or something.
same with me. I like to keep my brightness setting to the absolute minimum, however on numerious occassions i find that it has automatically brightned and when i go into the settings the slider is halfway.
I usually notice it after charging the phone, either way it shouldnt happen.
I had the same issue when i have installed the Voodoo lagfix + Voodoo Color.
Without Voodoo color, it was better.
Just want to check that you guys know that
you can adjust brightness using the drop-down status bar, right?
By swiping you finger left/right on the drop-down status bar, you could adjust brightness. (if "automatic brightness adjustment" is off)
INeedYourHelp said:
It starts when I'm not even touching the screen. It goes up and down, up and down, et. It's becoming more frequent now. I guess my lcd is dying or something.
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Click to collapse
hmmm... maybe light sensor problem?
edwinlinkt said:
hmmm... maybe light sensor problem?
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Click to collapse
I'm positive my lcd is dying. It started with JM1, continued in JPM and JP6. It flickers and goes up/down without any pattern.
edwinlinkt said:
Just want to check that you guys know that
you can adjust brightness using the drop-down status bar, right?
By swiping you finger left/right on the drop-down status bar, you could adjust brightness. (if "automatic brightness adjustment" is off)
Click to expand...
Click to collapse
You are a genius...i didnt realise that, maybe its my finger swiping thats chaging the brightness. Thanks
I'm such a doofus!
INeedYourHelp said:
I'm positive my lcd is dying. It started with JM1, continued in JPM and JP6. It flickers and goes up/down without any pattern.
Click to expand...
Click to collapse
What do you mean by flickering? Perhaps the brightness changes in such rapid succession? Try using light sensor test
Dial this number (as if calling someone) *#0589#
Try to block the light sensor with this app running and see if it's just a calibration thing, etc. though I don't know if it is calibrable (or whatever the word is )
PS: AM/OLED (or SAMOLED for that matter) is not a LCD
kapollo said:
What do you mean by flickering? Perhaps the brightness changes in such rapid succession? Try using light sensor test
Dial this number (as if calling someone) *#0589#
Try to block the light sensor with this app running and see if it's just a calibration thing, etc. though I don't know if it is calibrable (or whatever the word is )
PS: AM/OLED (or SAMOLED for that matter) is not a LCD
Click to expand...
Click to collapse
I've attached a zipped video in the first post.
EDIT: I tried this app when it was doing it, the app didn't respond at all to the changes, it kept reporting "Level 0". Which means it has nothing to do with it and I'm 100% certain this stupid thing is dying. And since I bought an unbranded/unlocked version from ebay, I don't think I can use the warranty. And even if I could, I've heard plenty of horror stories with warranties and support. I would just sell it for parts on ebay.

Volume key unlock

hi, is there any app that allows me to unlock screen with volume key? I have killed on/off button yesterday night.
Sent from my Optimus 2X using XDA App
Update: i have tried anyunlock, widgetlocker, button remapper non is working for me.
Update2:
I managed to swap volume up with power button, but it isnt working example:
It acts as power button. turns off and lock screen but when i press it again it doesnt wake the phone, only does when i press it imediately after locking.
Sent from my Optimus 2X using XDA App
try Go Locker .....u can find it on the market
Hey,
It seems we're out of luck if this guy is right:
http://forum.xda-developers.com/showpost.php?p=21652366&postcount=7
so basically it's a hardware issue - volume key presses don't register when the phone is in deep sleep. And if the phone doesn't go to deep sleep, it kills the battery pretty quickly.
Are you on CM (e.g. CM7)? If so then you have this feature "for free" - it's one of the options in the CyanogenMod Settings in the menu. One drawback is that this will not work if you have the music widget enabled on the lock screen.
EDITED: hmm, unless you meant not "awaking" the phone but just fully unlocking it, i.e. going directly e.g. to the main screen. In such case - I have not found such thing in CM7 (to some extent you can overcome this with gestures but that's still equivalent to moving the the slider or whatever in fact). Generally: is the lock screen really needed? Is there a way to get rid of the lock screen altogether?
Thanks for replies.
So it seems that about deep sleep is true. But i have set mix freq to 500 even 800 with no luck.
Yes i was on cm7. It was working just like for 5 secs or so after locking.
Is this tegra specific or LG?
Edit: wakelock app from the market works for me. It prevents phone from deep sleep.
Sent from my LG-P990 using XDA App
xtrustkillx said:
Thanks for replies.
So it seems that about deep sleep is true. But i have set mix freq to 500 even 800 with no luck.
Yes i was on cm7. It was working just like for 5 secs or so after locking.
Is this tegra specific or LG?
Edit: wakelock app from the market works for me. It prevents phone from deep sleep.
Sent from my LG-P990 using XDA App
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Click to collapse
How is your battery life now?
Very bad, 60% to 47 or 37 % i dont remember exactly, in 2 hours so constantly on charger at work.
Sent from my LG-P990 using XDA App
xtrustkillx said:
hi, is there any app that allows me to unlock screen with volume key?
Sent from my Optimus 2X using XDA App
Click to expand...
Click to collapse
i´m searching for this too
Use Tap Tap app from market, it uses your proximity to wake up the phone,don't need to touch any keys move your hands on proximity sensor ,phone wake's up..hit thanks if it helps
sundawg said:
Use Tap Tap app from market, it uses your proximity to wake up the phone,don't need to touch any keys move your hands on proximity sensor ,phone wake's up..hit thanks if it helps
Click to expand...
Click to collapse
Is it safe to always turn proximal sensor on for activate screen on with tap tap app. May proximal sensor got will short life than it should.
keep your music playing, and set your frequencies to 215mhz - 314mhz.
its what i sued to do, since my power butter was destroyed
sundawg said:
Use Tap Tap app from market, it uses your proximity to wake up the phone,don't need to touch any keys move your hands on proximity sensor ,phone wake's up..hit thanks if it helps
Click to expand...
Click to collapse
I tried for some time an application that would do this ... Thanks man ...
edit: I can not always wake up the phone ... I do not know if it's my fault or my o2x
bree1 said:
I tried for some time an application that would do this ... Thanks man ...
edit: I can not always wake up the phone ... I do not know if it's my fault or my o2x
Click to expand...
Click to collapse
it works until phone enters deep sleep, everything is off except power button.
If this deep sleep thing is correct, then there's no way of making the phone unlock without the power button? no matter what application you use for unlocking it? My phone is new and I don't want my physical buttons to wear out =/
daas88 said:
If this deep sleep thing is correct, then there's no way of making the phone unlock without the power button? no matter what application you use for unlocking it? My phone is new and I don't want my physical buttons to wear out =/
Click to expand...
Click to collapse
The risk is clearly near zero, my phone if one year old and I have no problem.
You have an app to change buttons mapping, it can be useful if your button is dead, but less clear when all are functional. Try to search 'button mapping' in market I don't remember the name.

[Q] Disabling back lit soft keys on screen touch

Yesterday i was looking for some app to notify me via LED about missed calls/other messages. Installed an app (don't remember app name) from Play store and immediately i observe that soft keys lit every time i touch the screen. It's very annoying. Problem remains same after uninstalling the app and today i flashed to V_10H but problem still exists.
Help me to resolve the problem also recommend any good app to notify the missed calls/messages.
Thanks
When the screen is on this is normal, but it happens when the screen is off also I think?
Just a guess, but try this:
Go to the soft key settings, set it to always on.
Then set your screen brightness on automatic.
Reboot and put the settings back to what you had first.
Reboot.
This helped with soft key light problems in V10F.
Arne_B said:
When the screen is on this is normal, but it happens when the screen is off also I think?
Just a guess, but try this:
Go to the soft key settings, set it to always on.
Then set your screen brightness on automatic.
Reboot and put the settings back to what you had first.
Reboot.
This helped with soft key light problems in V10F.
Click to expand...
Click to collapse
Thanks for response. I followed your steps..problem still exists.
This happens only when screen is on. I don't think its normal to lit soft keys when ever i touch main screen. I haven't noticed this until i installed app.
If it lit's up whenever i touch the screen doesn't it affect when i play games/seek video?
matrixddl said:
This happens only when screen is on. I don't think its normal to lit soft keys when ever i touch main screen.
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Click to collapse
It's always been like this for my phone.. When the screen is on, and the soft key lights are out, if I then touch the screen again they light up.
You can either disable the soft key lights or enable them to light up constantly, like I do now.
Arne_B said:
It's always been like this for my phone.. When the screen is on, and the soft key lights are out, if I then touch the screen again they light up.
You can either disable the soft key lights or enable them to light up constantly, like I do now.
Click to expand...
Click to collapse
very annoying feature..Why does it light up when i press screen? Do i have to turn on and off when i play games?
Hope dev's come up with a solution.
Thanks
I checked on my friends Sony xperia which doesn't light soft keys when touched main screen.
Sent from my LG-P880 using xda app-developers app
They can be disabled I n settings
Sent from my LG-P880 using xda app-developers app
matrixddl said:
very annoying feature..Why does it light up when i press screen? Do i have to turn on and off when i play games?
Hope dev's come up with a solution.
Thanks
Click to expand...
Click to collapse
does this happen even playing games or apps that controll screen light? Have you tested?
Playing nfs mw lights still off...... so yeah good
Sent from my LG-P880 using xda app-developers app
Subhajitdas298 said:
does this happen even playing games or apps that controll screen light? Have you tested?
Click to expand...
Click to collapse
I don't have apps that control screen light. I tired playing games like Bubble Words and light turns on every time when i touch screen. So i set lights to off always.
When the phone was new, i was on V_10e and i didn't have this problem. I installed some stupid app and it changed everything. I have upgraded to 10H but still problem exists and no way to prove that it worked earlier.
I don't get the logic behind lights on when i touch main screen.
Thanks

Disable capacitive button light ?

It's been 4 years of Galaxy S I9000 and no developer has yet developed a method to turn off the capacitive button light. This is very necessary as it could help with the very low battery capacity. I strongly request developers to concentrate their skills on this, to disable the light and thereby prevent the irritation to eye during the night & save a lot of juice.
Please Help
Thanks
Blackus17 said:
It's been 4 years of Galaxy S I9000 and no developer has yet developed a method to turn off the capacitive button light. This is very necessary as it could help with the very low battery capacity. I strongly request developers to concentrate their skills on this, to disable the light and thereby prevent the irritation to eye during the night & save a lot of juice.
Please Help
Thanks
Click to expand...
Click to collapse
Pardon me if I misunderstood your question.
If you just want the buttons not to turn on when receiving an sms (i.e. acting as notification led) then CyanogenMod has that option, just go into Settings->CyanogenMod->Audio->Quiet hours (or something to that effect), set from, say, 2:00 to 1:59 (all day minus 1') and check last option (Dim LED or something).
If you want them not to light up under any circumstance, well, I don't think I'd use that setting but I guess it'd be nice to have!
I want the lights permanently disabled.
Try adding qemu.hw.mainkeys =0 to the build.prop file of your phone. Just let me know if that helped. PS: If you're using Nightlies, the build.prop file keeps resetting.
Gokulbalram said:
Try adding qemu.hw.mainkeys =0 to the build.prop file of your phone. Just let me know if that helped. PS: If you're using Nightlies, the build.prop file keeps resetting.
Click to expand...
Click to collapse
No.. it doesn't work . I already tried it many times before starting this thread.
Blackus17 said:
No.. it doesn't work . I already tried it many times before starting this thread.
Click to expand...
Click to collapse
Say, are you on a Custom ROM?
I think "qemu.hw.mainkeys" is to disable the virtual button bar on JB roms and not to turn off the soft key backlights (although i could be wrong?). You can add an init.d script that shortens how long they stay on for (i don't think you can turn them off completely) i set mine to 000 sec and they stayed on permanently so i set it to 001 sec and that works for me. Do a search for the init.d script, it's on xda somewhere.
On certain custom ROMs, they do act as a notification LED. So, that stays on until you turn in the phone. So all you have to is go to Settings>Display>Notification Lights (it will be called something similar) and then turn it off. Some ROMs could have a different way to turn it off. Also, I don't think that you lose battery when they turn on as you click on the buttons.
Cheers! The thanks button is right there... Just saying..
Sent from my GT-I9000 using XDA Premium 4 mobile app

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