This doesn't really make sense, but the patch adding the pc-1.0-qemu-kvm machine type seems to be also adding pc-1.0-qemu-kvm as an alias for pc-1.0, all the way back to the original version where we introduced the patch. Which doesn't really make sense as the package did pass SRU testing.
When I build a new package without that extra alias, the migration gets further, though it then stops on Unknown savevm section or instance 'kvm-tpr-opt' 0 -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1291321 Title: migration fails between 12.04 Precise and 14.04 Trusty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1291321/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs