http://bugzilla.kernel.org/show_bug.cgi?id=12249





------- Comment #70 from peter.kl...@aon.at  2009-03-12 13:46 -------
2.6.29-rc7 (patch from comment #60 applied):

r...@asus:~# grep . /sys/class/backlight/*/*
/sys/class/backlight/acpi_video0/actual_brightness:0
/sys/class/backlight/acpi_video0/bl_power:0
/sys/class/backlight/acpi_video0/brightness:15
/sys/class/backlight/acpi_video0/max_brightness:15

The initial brightness in Gnome is usable. However stepping through brightness
levels does not work correctly. Setting the brightness levels through /proc
gives the correct brightness (10..lowest, 100..highest, total of 16 levels).

r...@asus:~# cat /proc/acpi/video/VGA/LCDD/brightness 
levels:  10 16 21 27 33 39 45 51 57 63 69 74 81 87 93 100
current: 100

In comparison to 2.6.29-rc7 without any patches applied (14 brightness levels)

r...@asus:~$ cat /proc/acpi/video/VGA/LCDD/brightness 
levels:  10 16 21 27 33 39 45 51 57 63 69 74 81 87
current: 87


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