I replaced the official proprietary NVIDIA driver nvidia-331 with nvidia-340 from xorg-edgers and the problem persists. nvidia-340 (340.76) is the latest driver for the legacy card Quadro FX 880M of my Lenovo W510.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1389215 Title: Brightness controls are not working in Unity / Xorg because of Nvidia proprietary driver. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1389215/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp