Does terminating light-locker and running "dm-tool lock" trigger the bug?
I assume that the problem is either caused by the GPU driver (both systems have the same generation Intel graphics) or lightdm-gtk-greeter. ** Changed in: light-locker (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/1801609 Title: Fails to VT-switch back to lightdm after user initiated wake-up events(not system-suspended, just locked and dpms active) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1801609/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs