This hack fixes the bug for me (in /etc/X11/xorg.conf): Section "Device" Identifier "Default Device" Option "RegistryDwords" "EnableBrightnessControl=1" EndSection
Now the control keys work, the notification bubble works and even direct control writing to /sys/class/backlight/mbp_backlight/brightness. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/743352 Title: LCD backlight doesn't respond to brightness control keys -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs