I know this issue is annoying but it's also a feature and not a bug. To turn it off (after you have logged in) go to:
Settings > Power > Power Saving > Automatic Brightness = OFF ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1938477 Title: Screen brightness changing randomly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1938477/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs