Xbacklight is used to adjust the backlight brightness where supported.
It uses the RandR extension to find all outputs on the X server
supporting backlight brightness control and changes them all in the
same way.
All questions regarding this software should be directed at the
Xorg mailing list:
http://lists.freedesktop.org/mailman/listinfo/xorg
Please submit bug reports to the Xorg bugzilla:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg
The master development code repository can be found at:
git://anongit.freedesktop.org/git/xorg/app/xbacklight
http://cgit.freedesktop.org/xorg/app/xbacklight
For patch submission instructions, see:
http://www.x.org/wiki/Development/Documentation/SubmittingPatches
For more information on the git code manager, see:
http://wiki.x.org/wiki/GitPage