On my laptop I traced it back to kernel and here is the fix: http://marc.info/?l=linux-acpi&m=124456088526538&w=2
-- Random reaction to brightness hotkeys https://bugs.launchpad.net/bugs/376924 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
