I have not yet fully tried it, but I have verified that the two core ideas also work for me:
a) When I press the brightness buttons the value in /sys/class/backlight/acpi_video0/brightness changes.
b) When I do: "sudo setpci -s 00:02.0 F4.B=a1" the brightness indeed changes
Before you try anything best read the thread yourself. Especially check with lspci |grep VGA whether 00:02.0 is the right address for your system. And be prepared for the fact that "sudo setpci -s 00:02.0 F4.B=0" gives you a pitch black screen :-) .
I just found a very promising workaround here: www.uluga. ubuntuforums. org/showthread. php?t=1446943
http://
I have not yet fully tried it, but I have verified that the two core ideas also work for me: backlight/ acpi_video0/ brightness changes.
a) When I press the brightness buttons the value in /sys/class/
b) When I do: "sudo setpci -s 00:02.0 F4.B=a1" the brightness indeed changes
Before you try anything best read the thread yourself. Especially check with lspci |grep VGA whether 00:02.0 is the right address for your system. And be prepared for the fact that "sudo setpci -s 00:02.0 F4.B=0" gives you a pitch black screen :-) .
Thanks to FunkyRider and Skildron