https://bugzilla.kernel.org/show_bug.cgi?id=15528





--- Comment #59 from Kyle <k...@kylegchristensen.com>  2010-05-24 15:05:14 ---
Zhang, 

I can change using the brightness keys. Attempting to overwrite the values in
/sys/class/backlight/acpi_video0/*brightness results in a bash error:
Permission Denied. This happens while logged in as root.

Furthermore, changing the value of brightness in /proc/acpi/video/GFX0/DD02/
changes the value within the file, but does not change the brightness of the
screen.

The hotkeys work here though.

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