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In my Sony Vaio Cw backlight brightness control worked fine in 11.10 and on 12.04 before some upgrade during the period 15-17 january. After that days, i cannot anymore change backlight. Note: In KDE i still can change it. now as workaround i use: echo 35 > /sys/class/backlight/nv_backlight/brightness lsb_release -rd Description: Ubuntu precise (development branch) Release: 12.04 cat /proc/version_signature Linux version 3.3.0-030300rc3-generic (root@gomeisa) (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #201202082335 SMP Thu Feb 9 04:36:53 UTC 2012 ** Affects: gnome-power-manager (Ubuntu) Importance: Undecided Status: New -- regression in vaio cw backlight https://bugs.launchpad.net/bugs/940162 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in Ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs