kernel-bug-exists-upstream-3.18-rc3 -- the aforementioned /usr/share/X11/xorg.conf.d/80-backlight.conf
with the contents: Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "sna" Option "Backlight" "intel_backlight" # use your backlight that works here BusID "PCI:0:2:0" EndSection continues to work to workaround it. ** Tags added: kernel-bug-exists-upstream-3.18-rc3 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1388636 Title: [Lenovo V570 Notebook] Brightness not changing via UI widget in GNOME shell or hotkeys To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1388636/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs