@PHLin Can you give the kernel param video.use_native_backlight=1", or utopic 3.16 kernel a try?
** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete ** Changed in: hwe-next Status: Triaged => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1393644 Title: [Dell Inspiron 3531] Brightness control does not work on 14.04.1 To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1393644/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs