VM Hibernate with igpu passed through (suspend to disk)

[bung69]

i am trying to hibernate a fedora VM to disk while a igpu is passed through.

When hibernating the VM using qm agent 100 suspend-disk VM screen goes off and appears to start to hibernate, however it does not appear to complete and still shows as running within the Proxmox UI. when stopping the VM and trying to start it again it will hang on the "Proxmox" ovmf screen untill a further reset.

A clone of the VM without the igpu suspends and resumes as expected (swap, etc in the VM is set up properly)

has anyone had any success with hibernating VM's with iGpu or dGpu passed through and are there any more hoops i need to jump through to make this work?

Thanks