On Thu, 2022-11-10 at 18:51 +0000, Patrick O'Callaghan wrote:
> > On my system I just have "iommu=pt", while "amd_iommu=on" for the
> > AMD
> > motherboard may have defaulted to "on" already.
> > 
> 
> OK, I corrected the boot line:
> 
> $ cat /proc/cmdline 
> BOOT_IMAGE=(hd2,gpt2)/vmlinuz-6.0.5-200.fc36.x86_64
> root=UUID=8e1f7af4-c0bf-434e-b1c4-a9af2c810d56 ro
> rootflags=subvol=root modprobe.blacklist=nvidia
> modprobe.blacklist=nouveau rd.blacklist=nvidia rd.blacklist=nouveau
> intel_iommu=on,igfx_off iommu=pt rd.driver.pre=vfio-pci
> vconsole.font=latarcyrheb-sun16 rhgb quiet resume=UUID=6c16e7ba-a483-
> 4832-ab9b-a32af7f46d62 audit=0 hugepages=4096
> 

I realised that I was still blacklisting the old Nvidia card instead of
the new AMD. However correcting to:

"... modprobe.blacklist=amdgpu rd.blacklist=amdgpu intel_iommu=on,igfx_off 
iommu=pt rd.driver.pre=vfio-pci ..."

still doesn't work.

poc

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