I have several RX 480 cards that I use to run virtual machines and one of them is getting bugged intermittently after several virtual machine restarts. When it happens, the screen either turns off or turns light grey and Windows 7 or 10 just BSOD repeatedly when starting. The only thing that helps consistently is restarting the entire PC. Once I was able to fix the card by doing the following:
1) Pull and reinsert the PCIE 6 pin power cable from it 2) Unbind card from vfio driver 3) echo "1" > /sys/bus/pci/devices/MY:CARD:NUMBER/remove 4) echo "1" > /sys/bus/pci/rescan Just steps 2 through 4 do not seem to help and I am a bit hesitant messing with cables on a running PC. Question: is there a way to reset the card without a restart? I get this situation fairly infrequently, but still it is a bit annoying. Also, would it make sense to add my card to pci-quirks.c where it handles older cards? There is no polaris cards there as far as I can see.
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