[vfio-users] GTX 580 Passthrough - Successes and Failures

[vfio]

Ah, interesting. I started by trying virtio 0.1.102 (stable), but this 
does not appear to support Windows 10 yet. When using virtio 0.1.112 
(latest), I experienced the freezing issues. After that, I simply 
stopped using virtio and this allowed Windows to install. I did not 
benchmark performance, but I assume it is poor. Windows update froze at 
24% even without using virtio, but it may be the case that I was simply 
too impatient.

Back when I had two 580 cards, it worked fine as long as the SLI cable 
was removed and I only passed through the card that was in the 
physically "lower" slot on the board. I was never able to successfully 
pass through the card in the slot physically closest to the CPU. In 
other words, a card in slot 1 will never work, and a card in slot 2 will 
only work as long as there is a graphics card in slot 1. Another way to 
look at it is that the card attached to the monitor showing the host 
UEFI screen will never work with passthrough.

That being said, it is possible that I am wrong about this: it could be 
the case that updates in the past year have resolved the issue, or that 
my problems back then were also caused by the PCI lane DIP switches.