Suspending and resuming stopped the problem briefly, but it reoccurred for me. I don't think it's a good work-around. Thanks for the tip anyway!
** Tags added: groovy -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1850172 Title: syslog flooded with these USB messages, but device doesn't exist To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1850172/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs