Hi, On Tue, Jul 23, 2019 at 03:49:44PM -0000, Darin Schmidt wrote:

I have 2 usb controllers installed via a riser card plugged into a M.2 slot. (Like those used for mining with GPU's). Everything works great for a long time, then my Windows 10 VM freezes and I lose all USB activity. LSPCI still sees the devices:

0a:00.0 USB controller: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller 0b:00.0 USB controller: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller 43:00.0 USB controller: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller 44:00.0 USB controller: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller

I assume a and b are the same physical card as its supposed to have 2 channels each, same with 44 and 43.

I tried for both 44 and 43

echo "1" > /sys/bus/pci/devices/0000\:43\:00.0/remove echo "1" > /sys/bus/pci/rescan echo "1" > /sys/bus/pci/devices/0000\:43\:00.0/reset

This did not work. I cannot determine if its just the VM thats no longer seeing/using the hardware or if its the hardware itself. I wonder if its a power state thing as well? Nothing I plug into the card seems to be recognized. Any Suggestions?

I'd guess that it could be some state issue in the host too. If you are using remote-viewer + spice for usbredir, you might consider checking the logs from the client to see channel's state when windows freezes. Log from spice server could also say if the issue is in the host + spice, but depending on the issue could be usb on qemu or guest drivers /o\

rebooting the VM doesnt help either. It appears the hardware is functioning, but anything you plug into it isnt being detected.

If you disconnect + connect your client, any changes? Which kind of usb device are you redirecting? Cheers, Victor