I think I'm seeing this bug too, need to check the logs later. Its definitely some kind of oops using KVM on 3.13.
CPU: Athlon64 X2, 4Gb RAM Kernel: linux-image-3.13-1-686-pae (3.13.10-1 and 3.13.7-1) in Jessie/i386 Bug can be avoided by booting the old 3.12 kernel. Symptoms: Works normally, but if I start a VM, the VM freezes quickly, usually within in BIOS or GRUB. Can be killed regularly. Kernel messages after a while. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org