Hello, I am also affected by this issue.
However, It seems this issue has been identified as Kernel bug - https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1007765?comments=all Thanks, Manasvi Gupta -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/987630 Title: changing brightness freezes computer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/987630/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs