@cunrun @jorge-gbs any init errors in dom0 /var/log/kern.log re. GIM driver? Also, if you search some topics here covering this specific GPU, there were mixed results booting dom0 with pci=realloc,assign-busses. Maybe it worth a try.

Up to date? What's your commit number? Also, the issue is not due to Xen Orchestra, but when XO is trying to ask for a snapshot or your VM (Async.VM.snapshot). This VM has a disk which is not usable because likely connected to another host which is shutdown or not there.