[Spice-devel] AC97 long run no sound issue

[Victor Toso]

Hi Edgar,

Thanks for taking time to report this issue.

On Wed, Jul 29, 2015 at 11:11:46AM +0800, Edgar wrote:
> Dear All,
>
> because of Windows VM with Intel HDA device(both ICH6 and ICH9) has poor sound quality and clicking issue
> (the sound has short tremble about every 4 seconds when playing 720p video).
> pls refer report http://lists.freedesktop.org/archives/spice-devel/2014-November/018038.html

Just to add more info regarding intel-hda device 'clicking' issue, we
have two bugs open about it, one for fedora 21 and other for rhel7 but
without a fix yet

https://bugzilla.redhat.com/show_bug.cgi?id=1176761
https://bugzilla.redhat.com/show_bug.cgi?id=1203507

> so I swith audio to AC97 , sound quality is perfect and video is very smooth,
> but VM has no sound after long run about 40 hours(video will freeze when playing video)
>
> My testing environment:
>
> Host:
> CentOS 7 with latest qemu-kvm  and spice-server from C7 repo.
> qemu-kvm-rhev-1.5.3-86.el7.centos.x86_64
> spice-server-0.12.4-9.el7.centos.x86_64
>
> Guest:
>   Windows7 64bit (with lastest spice-guest-tools and Realtek AC97 driver 6.0.1.6305)
>
> Client:
> spice-gtk-0.22-5
>
> I did following experiment:
> 1.both Windows7 and Fedora VM has same issue. so it seems not relative to Windows AC97 audio driver.
> 2.tried variety version of spice client from 0.20 to 0.29, same issue.
> 3.update spice-server to 0.12.5,same issue.
> 4.when no sound, disable AC97 device and enable it on windows device manager,sound occurs.
> 5.when no sound ,reboot VM sound will be OK.
>
> please help to investigate issue.
>

It would be good to have the logs with debug from QEMU + spice-server;
SPICE_DEBUG_LEVEL=4 should do it.

It would also be good, in case your host and client are the same
machine, to test with QEMU_AUDIO_DRV=pa (in case you are using
pulseaudio) this way we can verify if this is a spice bug or not.

You can file a bug under the server component [0] when you got more
info and if this is not related to spice we can move it afterwards.

[0] https://bugs.freedesktop.org/enter_bug.cgi?product=Spice

Best regards,
Victor Toso