I just upgraded to 4.4.0-91 from the main repository, and it boots again! All my virtual machines are running too.
Looks like this is fixed in something which was changed between -89 and -91. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1709511 Title: Kernel 4.4.0-89 panics on boot on xenial To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1709511/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs