[vfio-users] Cannot fix Error 43 for GTX 680 passed through to win 10 guest

[root at yoshi.dynu.com]

All my PCIe slots are occupied or covered by the 3 GPUs.

problem also is that my whole setup is rather old school. 4 monitors, 
all connected via VGA.

3 Monitors at my desk and one big old 40'' screen i front of the couch 
for movies and games (windows guest)

Sound is provided by the onboard soundcard an connected to a sony 
receiver via toslink.

i will see if i can stream the sound software based (audio jack seems to 
be a possibility) to the linux host. USB to in-line onboard sound card 
to the amplifier results in really bad sound quality.

Also updating my setup is not possible for me right now since a new 
motherboard + 6core CPU is not in the budget.

I hope that i will find a workaround. Thanks a lot again for the support 
since right now the basic functions are working fine.

Am , schrieb Alex Williamson:
> On Thu, 2015-10-15 at 18:31 +0000, root at yoshi.dynu.com wrote:
>> Sound via USB works fine now.. was a problem with the sampling rate.
>> setting it it 48 kHz solved the background noise.
>> 
>> Is there any way to fix the error produced when passing through the
>> onboard sound card? I'd really like to have full surround capability 
>> in
>> the windows VM.
> 
> This seems to be a problem that Intel has already fixed since most
> people have pretty good luck using the onboard audio.  Unfortunately,
> X58 is pretty old and there's not likely to be much interest from Intel
> or the development community to figure out what's wrong.  You should
> also factor in that your Westmere processor isn't going to have the 
> same
> virtualization performance as a modern Haswell, which makes the problem
> even less interesting.
> 
> If you only need audio out, maybe you can pull it off the HDMI or DVI
> port of the GTX680 since you're assigning it anyway.  Maybe your 
> monitor
> already has an analog or SPDIF output.  Are there any PCIe slots left 
> on
> the board?  A cheap plugin sound card may be an option.  Thanks,
> 
> Alex