I've just tested 4.3-wily (4.3.0-040300-generic #201511020949) in Ubuntu 15.10 and I still see this issue.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1471634 Title: After suspend/resume, screen brightness can only be switched between 0 and 100% To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1471634/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs