@Ross - there was no change to the users. Maybe finally bug 857651 was fixed in for lightDM to not show the system users.
For the hang itself, do you get and Host hangchecks, or other info in dmesg what is going on when entering the hang? With the description I can so far only hug and feel bad for you, but not fix any bug. Is there anything interesting in /var/log/libvirt/qemu/<guestname>.log or dmesg. Consider running dmesg -w in an extra console. Do you use anything uncommon, like PCI passthrough (which on some FW/IOMMU hardware can be buggy). Does it also happen with Ubuntu guests or only if you run Windows10? Can you provide the XML description of your guets config (virsh dumpxml guestname) to allow us to check the config for any known issues? ** Changed in: virt-manager (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1846281 Title: Full system locks up when logging into a Windows 10 KVM guest To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1846281/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs