Comment # 44 on bug 1197558 from Borislav Petkov

Thanks, apparently, one can't simply disable the iommu. Ok, back to the
previous situation. Joerg, pls have a look at comment #41, there's:

WARNING: CPU: 0 PID: 3514 at drivers/iommu/amd/init.c:851
amd_iommu_enable_interrupts+0x336/0x410

Something about interrupt remapping and something GA_LOG timeoutting.

Also, Graeme, I see you have BIOS from almost two years ago:

BIOS AF5NV701.25 12/15/2020

You could try updating it to see whether the IOMMU issue is fixed. Might be
related to the resume failure...

Thx.