I've managed to get this bug solved!
The answer is here: http://ubuntuforums.org/showthread.php?t=2181534&p=12819813#post12819813
Create the file /usr/share/X11/xorg.conf.d/20-intel.conf with the following content:
Section "Device" Identifier "card0" Driver "intel" Option "Backlight" "intel_backlight" BusID "PCI:0:2:0"
EndSection
Log out to see if it works.
I've managed to get this bug solved!
The answer is here: http:// ubuntuforums. org/showthread. php?t=2181534& p=12819813# post12819813
Create the file /usr/share/ X11/xorg. conf.d/ 20-intel. conf with the following content:
Section "Device"
Identifier "card0"
Driver "intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection
Log out to see if it works.