[Bugme-janitors] [Bug 23472] 2.6.37-rc2 vs. 2.6.36 laptop backlight changes?

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=23472





--- Comment #6 from Dan Carpenter <error27 at gmail.com>  2010-11-24 08:50:00 ---
I believe gnome uses this command to set the backlight:

bus-send --print-reply --system --dest=org.freedesktop.Hal \
    /org/freedesktop/Hal/devices/computer_backlight \
    org.freedesktop.Hal.Device.LaptopPanel.SetBrightness int32:<SETTING>

Where <SETTING> is the brightness level.

To view the current setting use:
bus-send --print-reply --system --dest=org.freedesktop.Hal \
    /org/freedesktop/Hal/devices/computer_backlight \
    org.freedesktop.Hal.Device.LaptopPanel.GetBrightness

(I have tested this on Ubuntu 10.4)

You can do this in a more simple way by going to:
/sys/devices/platform/eeepc/backlight/eeepc/

Except if you aren't using an eeepc then explore under your
/sys/devices/platform until you find the backlight settings.

cd /sys/devices/platform/eeepc/backlight/eeepc/
cat brightness
echo 4 > brightness
cat max_brightness > brightness

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