I'm also having issues with libvirt/kvm guests becoming unresponsive and they were all using cirrus as their video model. I've tried switching some to vga to see if that helps.
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1336801 Title: 12.04 guest hangs on a 14.04 host server with cirrus graphics Status in QEMU: New Status in “qemu” package in Ubuntu: Triaged Bug description: A new 12.04.4 server guest installation hangs on a 14.04 server host machine. I did the following: Created a new Virtual Machine with the Ubuntu 12.04 template using virt-manager Ran through the installation without a hitch to install a LAMP+SSH server. All standard options apart from that. On reboot the 12.04 guest started but then hung after doing fsck step. Trying different options (change disk driver, etc) made it progress a couple more steps but still hung. The thing that fixed it in the end was to switch to a VGA display driver, away from the default. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1336801/+subscriptions
