[Spice-devel] AC97 long run no sound issue

[Edgar]

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
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.

thanks!
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