I do not find any log with an error message, but a log of that upgrade process. That logs shows, which xen process were touched.
** Attachment added: "upgrade log" https://bugs.launchpad.net/ubuntu/+source/xen/+bug/1946094/+attachment/5531340/+files/apt-upgrade.txt ** Changed in: xen (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1946094 Title: VMs crash when updating systemd To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xen/+bug/1946094/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs