Yes, it also happens in a guest session. I'm attaching the corresponding ~/.xsession-errors
I do not use a background picture on the desktop: $ gsettings get org.gnome.desktop.background picture-uri '' $ gsettings reset org.gnome.desktop.background picture-uri $ gsettings get org.gnome.desktop.background picture-uri 'file:///usr/share/backgrounds/warty-final-ubuntu.png' This gives back the default background picture but the Brightness and Lock tool still does not show the brightness slider. ** Attachment added: "~/.xsession-errors in a guest session" https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/999888/+attachment/3177239/+files/.xsession-errors -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/999888 Title: Missing brightness control in System Settings/Brightness and Lock Status in “gnome-control-center” package in Ubuntu: Incomplete Bug description: There is something missing in the brightness and lock and i can not controll the brightnes. zafer@zafer-G41MT-S2:~$ lsb_release -rd Description: Ubuntu 12.04 LTS Release: 12.04 Desktop version updaed from 11.10 to 12.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/999888/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
