Looked in /var/crash after this happened again (did I mention it's systematically reproducible?) and there's nothing there.
I'm not sure what makes you think this has to do with NVidia drivers. This seems to suggest it doesn't: https://github.com/LibreCAD/LibreCAD/issues/1161#issuecomment-557833504 but I don't know. ** Bug watch added: github.com/LibreCAD/LibreCAD/issues #1161 https://github.com/LibreCAD/LibreCAD/issues/1161 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1853707 Title: Whole system stopped responding because of single program's fault - no way out, had to force power off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1853707/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs