On Tue, Sep 15, 2009 at 04:45:31PM -0400, Dave Allan wrote:
> I noticed that when a KVM guest created with virt-manager is running on
> F10, sound on the physical host stops working. When all VMs are
> shutdown, sound starts working again. Removing the <sound> tag from the
> VM XML allows sound to work while the VM is booted. To further
> complicate troubleshooting, if audio is already playing when the guest
> is started it keeps playing, since pulse already has the device open.
>
> The message in /var/log/messages when I try to play audio is:
>
> pulseaudio[6492]: module-alsa-sink.c: Error opening PCM device front:0:
> Device or resource busy
>
> strace of pulseaudio shows:
>
> open("/dev/snd/pcmC0D0p", O_RDWR|O_NONBLOCK) = -1 EBUSY (Device or
> resource busy)
>
> but fuser and lsof show nothing. A trivial test program also sees
> Device or resource busy when trying to open /dev/snd/pcmC0D0p
>
> I am in favor of removing the <sound> tag from the default
> configuration, since I don't use sound from within guests and I do use
> sound on my desktop, but perhaps this behavior is specific to my
> configuration. I haven't investigated it exhaustively. What does
> everybody else think?
It is complicated :-) In Fedora >= 11 we currently disable all use of
sound cards, but this upsets people who want sound ;-P I'm working
on a new version of the patch which sets up audio-over-VNC, while for
SDL allows the host audio backend to be used & configured.
I still need to finish my GTK-VNC patches to do the client end of
audio over VNC, then it'll all play correctly with desktop audio
services via gstreamer/pulseaudio
Daniel
--
|: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :|
|: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :|
|: http://autobuild.org -o- http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|
--
Libvir-list mailing list
Libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list