Android-x86-4.4-r2 on Asus T100TA - Battery drain issues

[David Collins]

I recently installed the android-x86-4.4-r2 image on my Asus T100TA tablet via this thread:

http://forum.xda-developers.com/windows-8-rt/win-8-development/winapp-android-x86-installer-uefi-t3225748

The install went very well and android actually flies on that tablet (probably better than it does natively on my Asus T300). The only two issue I am having are that the web cam light stays on 100% of the time when I am booted into Android, even when suspend by pressing the power button.

The bigger issue (possibly/probably related?) is that the battery drains very quickly, even when in suspend. The tablet back actually stays warm like it is still busy even after pressing the power button. It seems to drain about 10% per hour even with the screen off.

If I could solve this issue somehow I would be a happy camper. As it is now I have to boot back to Windows after using android or the battery will be dead the next time I pick it up. Any suggestions?

[David Collins]

Bump....

Anyone else running Android on a T100ta (I know it is a fairly inexpensive and popular test bed for projects like this) and have better sleep/screen off/power management behavior?

I have tried multiple Android & Remix versions, all of them seem to have serious sleep issues.

As I understand it, the camera light staying on could be fixed, but would also result in other sensors (rotation, backlight, possibly others?) not working as well.  I would definitely be willing to sacrifice those if it meant that the tablet would sleep.  Anyone know if the two issues are related?  If so, any instructions on how to recompile the kernel without those drivers installed?

Thanks in advance.

[Povilas Staniulis]

T100TA is one of the main development devices here.

Power management issues are well known, this is due to lack of proper PMIC driver (this affects all Bay Trail devices, not just the T100TA).

Situtation improved somewhat with kernel 4.4, but still no full support (but suspend is reported to work, at least on Ubuntu).

T100TA also suffers from freezing issues (again, kernel related). The only workaround for this is to disable C-States, but this will increase battery drain.