Re: Problems with audio device pass-through with the latest xen-unstable

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Mon, Dec 14, 2009 at 05:30:16PM +0200, Tom Rotenberg wrote:
> Hi,
> 
> I'm using the latest xen-unstable (changeset:20605:8f304c003af4), and
> i found out, that for some reason, there is a problem with audio
> pass-through on my Lenovo machines (i have tested it on both Lenovo
> X200 & Lenovo T400/T500). The problem is, that fater i pass-through
> the audio device (00:1b.0 Audio device: Intel Corporation 82801I (ICH9
> Family) HD Audio Controller (rev 03)), to the domU Windows XP, it
> doesn't identify any audio/media device. i have made sure, i have the
> Microsft UAA high-definition audio bus driver, and i still don't see
> any audio device.
> 
> It looks like a specific problem, because on a Dell e6400 machine the
> audio pass-through works fine.
> 
> Does anyone knows about such issue? or can guide me to where the
> problem might be?

Could you send me the lspci -vvv output of both devices? That is the one
working and non-working.

Also is there anything in the QEMU log?

One of the items that has not yet been back-ported from 2.6.18 is
making the BARs page-aligned... and I wonder if that is what you
are hitting (thought the more I think about it the less I think it is that
- the xm code will give you a fat warning about this).