Thank you for your bug report. Could you add your 'journalctl -b 0' log after getting the issue? Could also try if disabling the nvidia driver and using nouveau makes a difference?
** Changed in: xorg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874716 Title: Changing screen brightness fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1874716/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs