Rocko, You seem to have some newer kernels installed. Does booting those have the same problem?
Also, maybe you can try downgrading to cosmic's upower version: https://launchpad.net/ubuntu/+source/upower/0.99.8-2ubuntu0.1 to see if it was a regression in upower. ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Changed in: upower (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/1812161 Title: Screen backlight control does not work in Disco on Dell XPS 9560 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1812161/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
