Found the source of the v4l warnings; I was experimenting with v4lloopback to use a camera as webcam. Disabled that and it's gone away.
Unfortunately, /var/crash is empty and I didn't see any report from the right time in the errors webpage. After applying the change to add "Crash" to the crashdb.conf, I still don't see a crash dump in /var/crash after repro. However, I did find that the problem only repros in NVIDIA PRIME mode, not Intel. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1899766 Title: Xorg freeze after selecting large cursor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-435/+bug/1899766/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp