The X driver doesn't control brightness. Might be an issue in the userspace daemon. Or some ACPI quirkiness.
** Package changed: xserver-xorg-video-intel (Ubuntu) => gnome-settings- daemon (Ubuntu) ** Changed in: gnome-settings-daemon (Ubuntu) Status: Confirmed => New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/872932 Title: Brightness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/872932/+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