Heron: gnome-power-preferences lost display brightness

[Walter_Wittel]

Binary package hint: gnome-power-manager

At some point over the last few days of updates the display brightness slider disappeared from the gnome-power-preferences dialog and I can no longer control the display brightness of my Sony VAIO VGN-CR120E. Display brightness is still available if I boot the Heron Alpha 6 Live CD.

 lsb_release -rd
Description: Ubuntu hardy (development branch)
Release: 8.04

 apt-cache policy gnome-power-manager
gnome-power-manager:
  Installed: 2.22.0-0ubuntu2
  Candidate: 2.22.0-0ubuntu2
  Version table:
 *** 2.22.0-0ubuntu2 0
        500 http://archive.ubuntu.com hardy/main Packages
        100 /var/lib/dpkg/status

From preferences help it appears there may be a new Brightness Applet, however it is not showing up on my task bar and I don't see this listed as an issue for Beta. I have attached the output from gnome-power-bugreport.sh and will attach gpm.conf.values shortly.

Also xorg.conf doesn't seem to know what kind of video device I have, is that the problem?
Section "Device"
 Identifier "Configured Video Device"
EndSection

Section "Monitor"
 Identifier "Configured Monitor"
EndSection

Section "Screen"
 Identifier "Default Screen"
 Monitor "Configured Monitor"
 Device "Configured Video Device"
EndSection

I would be happy to supply additional info if you can direct me to scripts or commands to capture what you need. Thanks!

[Walter_Wittel (wittelw)]

Adding gpm.gconf.values.txt as requested on https://wiki.ubuntu.com/DebuggingGNOMEPowerManager

[Walter_Wittel (wittelw)]

I made some relevant comments on this in bug https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/201762