July 7, 20232 yr My USB flash died last week, but I got the server up again. However, in order to split IOMMU groups to enable sound in my VM, I enabled ACS override for downstream according to SpaceInvader One's excellent video from about 16:00. I believe this is what I had to enable previously in order to get sound working. However, the server will no longer boot. It starts from the USB, and then stops after the lines I have printed below: vfio-pci 0000:01:00.0 vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=none vfio-pci 000:0b:00.0 vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem I took the USB drive to another computer, edited syslinux.cfg and removed the acs override option that I added, but the issue is the same... Anyone able to shed light on this?
July 8, 20232 yr Author Solution Ok, so I found the file vfio-pci.cfg under the config folder on the USB flash drive. It contained a line starting with BIND=, followed by these IDs that I listed above. I just deleted that file, and the server booted fine. I have a copy of that file just in case, but it seems no new file with the same name has been created. I'm assuming this binds the GPUs to certain IDs? Anyway, my VM with GPU passthrough is working like before, and server is thankfully doing fine.
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