I think I was able to mitigate the issue by ejecting the GPU and switching to qemu emulated graphics before the shutdown and then reverting this process after a restart. I am fairly sure it all started with 17.12.02 version of Radeon drivers. 17.10.02 seems to be working fine. Did we get the reset bug back via a software upgraded and even on the cards where it did not happen before?
2017-12-26 14:06 GMT-08:00 Nick S <nick.kv...@gmail.com>: > 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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