Comment # 12 on bug 1078548 from Neil Rickert

Created attachment 758685 [details]
screenshot after restarting virt-manager

I followed that suggestion.

On the new upgrade the display froze again -- a bit later this time (perhaps
because I installed a virt-manager update last night).

I took a screenshot.  Then I shutdown virt-manager.

I restarted virt-manager, and opened the running virtual machine.  The display
had made notable progress.  However, it was still frozen, but at a different
location in the upgrade.  I took another screenshot.  I've attached both
screenshots.

I then waited for the upgrade to finish -- I could recognize this because the
VM rebooted.  And the upgraded VM seems to be running fine.