Hi, I (and promox users) have same problem than this bugreport
https://bugs.launchpad.net/qemu/+bug/1536487 https://forum.proxmox.com/threads/cant-live-migrate-after-dist-upgrade.26097/ Migrating from qemu 2.5 with pc-i440fx-2.4 to qemu 2.4.1 don't work. qemu-system-x86_64: error while loading state for instance 0x0 of device 'fw_cfg' Details are in the bugreport. Regards, Alexandre