[vfio-users] USB passthrough failing on ovmf

[Will Marler]

I'm guessing this is hardware specific, and I have no useful information to
add. I pass through a USB mouse, and it works very smoothly.

"Works for me" isn't really helpful so .. the reason I'm responding is that
I used to pass through a USB headset, and it would work, but the audio
would be crackly (not bad, but ultimately I decided I needed clear sound).
I fixed this by getting a PCI USB card ($10 for a new 4-port USB 3.0 card
on eBay), and passing the whole PCI card through to the guest. Perhaps, if
your issue IS hardware specific, you could also get a PCI USB card, connect
your mouse to the new PCI card, and still pass through just the USB mouse
to the guest. It's a fairly inexpensive thing to try.

Will


On Wed, Dec 9, 2015 at 6:30 AM, Doug Applegate <doug.applegate at gmail.com>
wrote:

> On Mon, Dec 7, 2015 at 8:21 PM, Mark Weiman <mark.weiman at markzz.com>
> wrote:
> > 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
>
> I've separated the usb passthrough into separate scripts like this:
>
> and passthrough using
> <hostdev mode='subsystem' type='usb' managed='yes'>
>   <source>
>     <vendor id='0x045e'/>
>     <product id='0x00db'/>
>   </source>
> </hostdev>
>
> and then passing it through using
> virsh attach-device doug-win /home/doug/keyboard.xml
>
> However, even that's not 100% since I'll often lose mouse/keyboard or
> both when I switch from DVI to HDMI.
>
> here's the rest of my config:
> http://pastebin.com/u5EF2Cwj
>
> virsh --version
> 1.2.18.1
>
> QEMU emulator version 2.4.1 (qemu-2.4.1-1.fc23)
>
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