View Full Version : [ubuntu] Unity: Screen brightness resets to minimum after reboot

Forever Delayed
November 10th, 2011, 07:16 PM
I'm having a problem with Unity in Oneiric. Everytime I boot up, the screen brightness is set to the lowest setting. I reset it to the maximum every time, but when I reboot it's back to the lowest setting again. How can I change this so my brightness settings persist?

April 24th, 2012, 11:11 PM
I found a solution that works for me:

sudo gedit /etc/rc.local

Add the line

setpci -s 00:02.0 F4.B=00


exit 0

May 4th, 2012, 06:06 PM
Actually, the above solution wasn't a total fix for me. The screen still went dim sporadically.

For a variety of reasons, I eventually reinstalled 12.04 Precise Pangolin from scratch. I still had the same brightness problem but found a workaround (http://ubuntuforums.org/showthread.php?t=1971708). If your brightness slider is backwards, my solution will probably work for you.