[libvirt-users] ergodox keyboard not working on USB hostdev passthrough

[Paul Handy]

I'm using a bit of a different keyboard, the infinity ergodox [
https://input.club/devices/infinity-ergodox/]. It functions just fine as a
keyboard on my host computer, but when I try to bind it to the guest,
nothing seems to happen.

lsusb gives its ID:
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
*Bus 005 Device 003: ID 1c11:b04d*
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 258a:0001
Bus 001 Device 002: ID 093a:2521 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 004: ID 8087:0a2b Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

So, I made a file, hostdev-1c11:b04d.xml, which contains the following:
<hostdev mode='subsystem' type='usb' >
  <source>
    <vendor id='0x1c11'/>
    <product id='0xb04d'/>
  </source>
</hostdev>

Note, I have had this same xml inside the domain's xml, but have pulled it
out separately so that I could run:

virsh attach-device linux-x86_64 hostdev-1c11:b04d.xml

It appears to attach the device, as it becomes visible in the domain's
lsusb:
Bus 001 Device 001: ID 1d6b:0002
Bus 004 Device 001: ID 1d6b:0001
*Bus 003 Device 003: ID 1c11:b04d  *
Bus 003 Device 001: ID 1d6b:0001
Bus 002 Device 003: ID 093a:2521
Bus 002 Device 002: ID 258a:0001
Bus 002 Device 001: ID 1d6b:0001

The mouse works just fine. I bought a cheap keyboard to test out, and it
works just fine. My pet keyboard, however, doesn't work on the guest.
Nothing seems to register. Any ideas here what I could do? Drivers? ROM's?
I've tried both SeaBIOS and OVMF with no difference in outcome, and while
this appears to be a hardware problem, I don't know where to begin.

Thanks,

Paul
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