I assume you have a Thunderbolt dock? I see the same, happens each time after undocking and then the dock won't work anymore until a reboot.
It seems to be a problem with a double dereference in xhci dbgtty. Check this bug at redhat, which describes the problem and also has a fix: https://bugzilla.redhat.com/show_bug.cgi?id=1565131 ** Bug watch added: Red Hat Bugzilla #1565131 https://bugzilla.redhat.com/show_bug.cgi?id=1565131 ** Attachment added: "dmesg - thunderbolt attach and deattach" https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1767452/+attachment/5130886/+files/thunderbolt_crash -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767452 Title: kernel oops when I undocked To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1767452/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
