Comment 75 for bug 971061

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Ayberk Özgür (equilibriumtr) wrote :

Just as a side note, adding

acpi_osi='!Windows 2012'

to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub seems to have fixed the battery charge/discharge state detection that most people are experiencing besides the lid close detection. 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

The lid close events are still not detected.