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

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