I have this same problem but also solved it by leaving randrtray running. this does achieve the resolution change, but leaves the plasma bar at the previous resolution, so i have to resize it each boot.
-- Screen Resolution is not being restored after relogin https://bugs.launchpad.net/bugs/268434 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs