[Bug 393430] Re: kvm: please prefer ALSA over OSS

[Arie Skliarouk]

I did dist-upgrade and now the situation is the same as in the bug
description, so we are squarely at the beginning:

... once a virtual machine with working audio card starts, the kvm grabs
the audio card entirely for itself. Any subsequent operations on audio
card either from the host machine, or from the other audio-enabled
virtual machines lock up (apparently awaiting on on access to the audio
card).

# lsof | grep snd
kvm       2085       root  mem       REG                8,1      385016   12068460 /usr/lib/libsndfile.so.1.0.20
kvm       2093       root  mem       REG                8,1      385016   12068460 /usr/lib/libsndfile.so.1.0.20
kvm       5343       root  mem       CHR              116,7                   3967 /dev/snd/pcmC0D0c
kvm       5343       root  mem       REG                8,1      385016   12068460 /usr/lib/libsndfile.so.1.0.20
kvm       5343       root  mem       CHR              116,6                   3963 /dev/snd/pcmC0D0p
kvm       5343       root   20r      CHR              116,2         0t0       3859 /dev/snd/timer
kvm       5343       root   21u      CHR              116,6         0t0       3963 /dev/snd/pcmC0D0p
kvm       5343       root   22u      CHR              116,9         0t0       3971 /dev/snd/controlC0
kvm       5343       root   23r      CHR              116,2         0t0       3859 /dev/snd/timer
kvm       5343       root   24u      CHR              116,7         0t0       3967 /dev/snd/pcmC0D0c
kvm       5343       root   25u      CHR              116,9         0t0       3971 /dev/snd/controlC0
gnome-set 5541        gdm  mem       REG                8,1      385016   12068460 /usr/lib/libsndfile.so.1.0.20
pulseaudi 5559        gdm  mem       REG                8,1      385016   12068460 /usr/lib/libsndfile.so.1.0.20
gconf-hel 5561        gdm  mem       REG                8,1      385016   12068460 /usr/lib/libsndfile.so.1.0.20
#

I though that alsa interface to sound card allows several users simultaneously...
Will running kvm with pa (pulseaudio) driver solve the problem? How can I do that?

-- 
kvm: please prefer ALSA over OSS
https://bugs.launchpad.net/bugs/393430
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