Ubuntu
linux package

  1. Bug #518002
  2. Comment #28

Comment 28 for bug 518002

Revision history for this message
Wolfgang Kufner (wolfgangkufner) wrote : Re: lucid extensa 5635z backlight dimming not working at all

I just found a very promising workaround here:
http://www.uluga.ubuntuforums.org/showthread.php?t=1446943

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 :-) .

Thanks to FunkyRider and Skildron