I spoke too soon, it's back again this morning when I accidentally clicked and dragged a hyperlink in Chrome:
Jun 18 07:43:22 bxps /usr/lib/gdm3/gdm-x-session[3594]: nvLock: client timed out, taking the lock Jun 18 07:43:27 bxps /usr/lib/gdm3/gdm-x-session[3594]: nvLock: client timed out, taking the lock -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1825626 Title: nvLock: client timed out, taking the lock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-418/+bug/1825626/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs