Re: [win-pv-devel] Driver 9.0.0 no keyboard in vncviewer, USB-passthru only with qemu-traditional

["Durrant, Paul" <pdurrant@xxxxxxxxxxxx>]

> -----Original Message-----
> From: win-pv-devel <win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx> On Behalf
> Of Steffen Einsle
> Sent: 05 January 2020 00:44
> To: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> Subject: [win-pv-devel] Driver 9.0.0 no keyboard in vncviewer, USB-
> passthru only with qemu-traditional
> 
> Hello,
> 
> I just installed a Windows 2019 Server with the new 9.0.0 PV drivers
> under xen 4.12.1. I use gentoo and since I need usb-passthru I have to
> use the qemu-traditional useflag (or device_model_version =
> 'qemu-xen-traditional').
> 
> Now when I try to login via vncviewer to complete the setup, my keyboard
> isn't working.

Hi,

  The PV vfb/vkbd implementation in qemu trad is buggy, I think. I suggest you 
disable XENVKBD and XENHID in your guest and use the emulated USB tablet 
device, as before.

> 
> - Keyboard works without qemu-traditional
> 

  Yes, upstream QEMU has a fixed PV protocol backend.

> - Keyboard works with older PV drivers (8.2.2)
> 

  Yes, because there was no XENVKBD or XENHID before.

> - USB-passthru works only with qemu-traditional
> 

  That seems odd, but I guess nor many people use USB passthru so it could have 
got broken with upstream somewhere along the way.

> For now I can switch to qemu-xen, activate rdp and change back to
> qemu-traditional to get usb-passthru again - but this is an ugly hack.
> There should be a better way.
> 
> Is there a general trick to get USB-passthru working with qemu-xen?
> (without qemu-traditional my usbdevice = ['tablet', 'host:0d46:3003']
> prevents domu creation - device-model-exited-error)
> 

  I think that is probably something to post on xen-users or xen-devel. Have 
you ever had USB passthrough working with upstream QEMU? There's nothing at 
https://wiki.xenproject.org/wiki/Xen_USB_Passthrough to suggest it is only 
supported using trad so if it is broken it needs fixing. What does your qemu 
log (under /var/log/xen) say was the reason for failure? (I'm guessing it was 
probably malformed command line, which would mean there's a bug in libxl).

> Is there a way to get my vnc keyboard working with qemu-traditional?
> (apart from using the older PV drivers, of course)
> 

  As I said, just don't use the PV HID driver and you should be fine.

    Paul

> Thank you for your time.
> 
> 
> 
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