RX580 GPU Passthrough. Grey screen and freeze after F32 update (not kernel)

Using Unraid host with Fedora 32 guest. UEFI boot (OVMF) and Q35-5.0 machine.
F32 live ISO boots fine and install works ok.

Initial reboot is ok and passthrough of RX580 gpu is working as expected

After sudo dnf upgrade and reboot I am left with a grey screen frozen mouse but the underlying linux is running so I can SSH into system.

I’ve reinstalled and put exclude=kernel* into dnf.conf before upgrade and that doesn’t help,so guess not a kernel bug.

Here is fpaste: https://paste.centos.org/view/8f088e6a

This looks nasty:

  1. Sep 19 16:45:22 fedora-localhost kernel: BUG: unable to handle page fault for address: ffffffffffffffe2
  2. Sep 19 16:45:22 fedora-localhost kernel: #PF: supervisor read access in kernel mode
  3. Sep 19 16:45:22 fedora-localhost kernel: #PF: error_code(0x0000) - not-present page
  4. Sep 19 16:45:22 fedora-localhost kernel: Oops: 0000 [#1] SMP PTI

Kernel is 5.6.6-300.fc32.x86_64

I’m not a linux expert. Any help appreciated

Phil