Originally this sounded like a duplicate of bug 1431200, as that's pretty much the only point in time when an upgrade of the systemd package could even remotely trigger a graphics state change, by accidentally reloading/restarting some units like plymouth. But you said that this happens on upgrading non-systemd systems, so systemd can't possibly do that. Installing/upgrading things like console-setup-linux could very well do that, though.
Do you have a way to reproduce this? By e. g. "sudo apt-get install --reinstall systemd", or reinstalling other packages from that set, like console-setup-linux? With "non-systemd systems", did you mean you upgraded from e. g. utopic, or that you manually installed upstart-sysv again to continue running upstart under vivid? ** This bug is no longer a duplicate of bug 1431200 daemon-reload runs alsa-restore.service and others ** Changed in: systemd (Ubuntu) Status: New => Incomplete ** No longer affects: apt (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1428712 Title: Screen turns green and locks out during apt full-upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1428712/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs