http://bugzilla.kernel.org/show_bug.cgi?id=8902
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------- Comment #4 from [EMAIL PROTECTED] 2007-08-24 01:38 -------
Please confirm that
/sys/class/backlight/thinkpad_screen/brightness can work for you.
Hi,Henrique,
I notice that the thinkpad_acpi don't do any actual work but export an input
event instead when it's notified for a backlight change.
Ideally, there should be some user space applications to listen to the input
events(KEY_BRIGHTNESSUP/KEYBRIGHTNESSDOWN) and thus change the backlight
through /sys/class/backlight/..., am I right?
Another problem is that xrandr can also change the backlight on thinkpad
laptops
#echo 0 > /sys/class/backlight/thinkpad_screen/brightness
/* screen is dark */
#xrandr --ouput LVDS --set BACKLIGHT 40000
/* screen becomes light again */
#cat /sys/class/backlight/thinkpad_screen/brightness
0 /* this is not updated */
This is really buggy, isn't it?
Thanks,
Rui
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