February 5, 20206 yr I'm trying to pass through my new Radeon 5700 to VM but I'm getting hit with a lot of "AMD-Vi: Completion-Wait loop timed out" errors both when booting up Unraid and when starting the VM. Any ideas why this happens? I am able to pass through a 1060TI with no problem so perhaps this is something specific with the Radeon 5700 GPU? Has anyone been sucessfully passed through a Navi 10 GPU on a Ryzen (Gen 1) platform?
February 28, 20206 yr I'm seeing the same thing with an ASRock x370 taichi board and RX 580 card. I haven't noticed it when booting Unraid, but maybe every 5 or so times I start my windows VM, I get this issue. Sometimes it disappears within a second or two, but sometimes it basically brings down my whole system. Twice this has resulted in my cache pool becoming unmountable. I've tried various bios settings and kernel parameters, but it still happens. It's annoying as most of the time is works perfectly. But the hanging and cache pool issues are too catastrophic to put up with. I'm going to try adding a cheap second card dedicated to Unraid, but if that doesn't work I'm probably going to swap to an x470 board. I've seen posts claiming no issues with passthrough on several x470 boards.
April 9, 20206 yr Anyone have any luck trying to resolve this? Tried passing through an RX570 last night to a Mac VM on an ASRock x470 and ended up with the same. Edited April 9, 20206 yr by damnshaneisthatu spelling
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