Re: [Xen-users] AMD cards - VGA passthrough no more possible with newer Xen / kernel releases

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2014-04-09 at 00:36 -0700, H. Sieger wrote:
> As to the domU shutdown/reboot issue with xl it has been reported many
> times.

Please do report bugs or "bump" existing ones if they are affecting you.

For issues with xl it would be useful to try both qemu-xen and
qemu-xen-traditional as the device model.

Your logs show an issue connecting the disks, which seems unlikely to be
directly related to passthrough, more likely it is a knockon effect from
something else failing and qemu giving up. It might be that the qemu
logs (under /var/log/xen/*dm*.log) show more info.

> The only thing I haven't read yet is that someone is trying to fix
> this. Or is there actually a fix or release that works?

Unfortunately VGA passthrough is an area which although devs are
interested in few actually have the time available to work on.

That said I think there is currently someone from AMD looking into
passthrough. If you are interested in this functionality and have the
hardware then I'm sure they'd be interested in any help you can give,
either in the form of patches or testing or investigating issues etc.

Ian.


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