[vfio-users] USB passthrough failing on ovmf

Mark Weiman mark.weiman at markzz.com
Tue Dec 8 03:21:08 UTC 2015


On Thu, 2015-12-03 at 22:21 -0700, Doug Applegate wrote:
> Hey, just recently got a setup where I'm doing GPU passthrough using
> OVFM and Windows 10. Many thanks to Alex and his blog :)
> 
> I have a few little 'quirks' that are annoying that I'd like to
> resolve and hoping that maybe someone had similar issues knows how to
> fix it.
> 
> I've got my Windows 10 guest set up and configure USB passthrough for
> my mouse and keyboard. However, I can never seem to get it to pass
> through on guest startup.  It seems that it works when it first
> starts
> to boot, but then it'll lose it as soon as windows boots.  I have to
> remove the USB device and re-add it through virt-manager to get it
> working again.  Is there a good way to fix this?  I'm using Fedora 23
> host and selinux is set to permissive.
> 
> Here's my XML config:
> 
> <snip>
> 

I'm having similar issues with USB passthrough, I also hae issues then
adding the device with usb_add in QEMU Monitor where the device
connects and reconnects over and over.

Mark Weiman
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