https://bugzilla.kernel.org/show_bug.cgi?id=44161

Ayberk Özgür <equilibriu...@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |equilibriu...@gmail.com

--- Comment #76 from Ayberk Özgür <equilibriu...@gmail.com> ---
Adding 

acpi_osi='!Windows 2012' 

to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub seems to have fixed the
problem for me (linked to the solution given in the comments on
https://bugs.launchpad.net/ubuntu/+source/acpi/+bug/971061 ). The fix seems
permanent; after about 10 reboots and 15 sleeps, the battery's charge/discharge
states are still detected correctly. On top of that, the keyboard backlight
started and is still working too :) It adjusts the brightness automatically
according to the ambient light. Adjustment from keyboard (Fn+F9, Fn+F10) still
has no effect though. 

I am on the following configuration:

-Samsung NP900X4C
-Kubuntu 12.04.2
-Kernel 3.10.4-031004-generic
-BIOS P08ABK
-acpid-2.0.10

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