This seems to be fixed on 3.2.0-31.50 which I installed yesterday, brightness keys now work both when on battery and on AC power.
"Fixed by unknown update", but I'll still mark as Fix Released per Ubuntu bug handling policy. Thanks! ** Changed in: linux (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1042311 Title: [Samsung QX410] Brightness keys malfunction after upgrade to 3.2.0-29.46 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1042311/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs