LCD Brightness no longer works on Sony VGN-CR120E

[Walter_Wittel]

Binary package hint: gnome-panel

The Panel LCD Brightness control worked on 7.10 but is now broken after an upgrade to 8.04 Alpha on an x86_64 build.

I can still control the brightness using /etc/acpi/sonybright.sh, but dragging the slider has no effect (and up/down arrow keys no longer move the slider when it is in focus).

Description: Ubuntu intrepid (development branch)
Release: 8.10
walter@waltwld5:/etc/acpi$ apt-cache policy gnome-panel
gnome-panel:
  Installed: 1:2.22.2-0ubuntu2
  Candidate: 1:2.22.2-0ubuntu2
  Version table:
 *** 1:2.22.2-0ubuntu2 0
        500 http://us.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status

Linux waltwld5 2.6.26-2-generic #1 SMP Thu Jun 19 15:49:49 UTC 2008 x86_64 GNU/Linux

00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 0c)

[Walter_Wittel (wittelw)]

sonybright.sh works, but here is where it comes from if it is helpful:

walter@waltwld5:~$ apt-cache policy acpi-support
acpi-support:
  Installed: 0.109
  Candidate: 0.109
  Version table:
 *** 0.109 0
        500 http://us.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status

[Pedro Villavicencio (pedro)]

not a gnome-panel issue, could be a gnome-power-manager or acpi one.

[Walter_Wittel (wittelw)]

Still not working with latest updates today (this is a regression from 8.04 where it worked). Per above I can control the brightness via /etc/acpi/sonybright.sh, so my impression is that it is related to the panel "Brightness Applet", perhaps not the gnome-panel itself.

If someone can provide with some steps to debug I can dig in a deeper.

[Pedro Villavicencio (pedro)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. Could you please attach the resulting log file of: gnome-power-bugreport.sh &> gpm.log to the report? You might also want to take a look to the Debugging instructions located at https://wiki.ubuntu.com/DebuggingGNOMEPowerManager for submit any other logs related to your problem.Thanks in advance.

[Walter_Wittel (wittelw)]

Attaching requested log. Note I'm running same (current updates) intrepid nversion (but i386) on an Asus 900 and the applet works fine there (as it did on 8.04 on my Vaio). Let me know if there is something else specific you need. I'll have a look at the wiki and see if there is something else I can contribute on my own. Thanks!

[John Carlyle-Clarke (jpcc)]

On my Sony Vaio FS840/W, the panel brightness control worked in 8.04 but does not work at all in latest and greatest 8.10 beta. This machine has an Intel Mobile 915GM/GMS/910GML Express Graphics Controller.

[Walter_Wittel (wittelw)]

This 7.10 regression is now fixed in 9.04 Jaunty Alpha 5 but remains broken on Intrepid 8.10. Is there some way to get the fix into the 8.10 updates?

[Victor Vargas (kamus)]

Since this report have a long time without activity, could you check (if is possible) in latest version included in Karmic if this issue is still happening? Thanks in advance.

[Walter_Wittel (wittelw)]

I have upgraded to the release version of Karmic + patches and the applet continues to work correctly (as well as the Fn-F5/F6 buttons) and has AFAIK since Jaunty Alpha 5.

I do not have a patched version of 8.10 to see if the regression ever got fixed but I guess it is getting close to the end of support so maybe isn't relevant any more.

[Launchpad Janitor (janitor)]

[Expired for gnome-power-manager (Ubuntu) because there has been no activity for 60 days.]