The system enters grub mode after killing the VM process.
To reproduce
sever@sever:~/scripts/stresstest$ ps ax | grep qemu 839938 ? Sl 5:06 /usr/bin/qemu-system-x86_64 -name guest=r5-roll sudo kill -9 839938
And start VM again.
Sometimes it happens the first time, sometimes the fifth.
I can't reproduce it with stable release 1.2.6-s1
Script for testing.
#!/usr/bin/env bash VM_NAME="r5-roll" while true; do virsh start ${VM_NAME} sleep 7 sudo kill -9 $(ps ax | grep qemu | egrep -v grep | awk '{print $1}') sleep 1 done