Fedora 12 host and windowsXP guest - No Sound from guest

[Daniel Sanabria]

Hi all,

I can't get any sound out of a windows xp guest. I've tried <sound
model='es1370'/> and  <sound model='ac97'/> and windows seems to
recognize
them ok but no sound at all.

My audio setup in the host is fairly simple, fedora12 and an integrated
sound card + a USB headset, both are successfully detected by fedora and I
can switch between the 2 without problems.

I feel like something is missing here, the host_sound and guest_sound
doesn't seem to be integrated properly. What setting can I change to get
sound out of the guest?

Thanks in advance,

Daniel

[Dor Laor]

On 12/29/2009 04:57 PM, Daniel Sanabria wrote:
>  Hi all,
>
>  I can't get any sound out of a windows xp guest. I've tried <sound
>  model='es1370'/> and <sound model='ac97'/> and windows seems to
>  recognize them ok but no sound at all.
>
>  My audio setup in the host is fairly simple, fedora12 and an integrated
>  sound card + a USB headset, both are successfully detected by fedora and
>  I can switch between the 2 without problems.
>
>  I feel like something is missing here, the host_sound and guest_sound
>  doesn't seem to be integrated properly. What setting can I change to get
>  sound out of the guest? 
It might be a qemu issue - there are several config options for qemu 
package: --audio-drv-list=oss/alsa/sdl on upstream code non worked 
reliably for me, in the past it did work, so its probably a regression.

>  Thanks in advance,
>
>  Daniel
>
>
>
>  _______________________________________________
>  Fedora-virt mailing list
>  Fedora-virt(a)redhat.com
>  https://www.redhat.com/mailman/listinfo/fedora-virt

[Daniel Sanabria]

thanks Dor,

looking at the logs you seem to have a point:

LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none
/usr/bin/qemu-kvm -S -M pc-0.11 -m 1024 -smp 1 -name winxp -uuid 8
8b53573-a3c1-3e12-8703-ea3fc8580493 -monitor
unix:/var/lib/libvirt/qemu/winxp.monitor,server,nowait -localtime -boot c
-drive file
=/var/lib/libvirt/images/winxp.img,if=ide,index=0,boot=on,format=raw -drive
file=/home/daniel/ISO/WINXP_SP2_PRO.iso,if=ide,media=c
drom,index=2 -net nic,macaddr=52:54:00:62:66:ed,vlan=0,name=nic.0 -net
tap,fd=18,vlan=0,name=tap.0 -serial pty -parallel none -usb
 -usbdevice tablet -vnc 127.0.0.1:1 -k en-gb -vga cirrus -soundhw es1370

I noticed the QEMU_AUDIO_DRV=none variable here which is how virt-manager is
trying to start the vm. Shouldn't that be QEMU_AUDIO_DRV=pa in the case of
Fedora 12? How can I change that value, so virt-manager starts the vm
correctly?

2009/12/30 Dor Laor <dlaor(a)redhat.com&gt;

>  On 12/29/2009 04:57 PM, Daniel Sanabria wrote:
>
> > Hi all,
> >
> > I can't get any sound out of a windows xp guest. I've tried <sound
> > model='es1370'/> and <sound model='ac97'/> and windows seems
> to
> > recognize them ok but no sound at all.
> >
> > My audio setup in the host is fairly simple, fedora12 and an integrated
> > sound card + a USB headset, both are successfully detected by fedora and
> > I can switch between the 2 without problems.
> >
> > I feel like something is missing here, the host_sound and guest_sound
> > doesn't seem to be integrated properly. What setting can I change to get
> > sound out of the guest?
> >
>
>  It might be a qemu issue - there are several config options for qemu
>  package: --audio-drv-list=oss/alsa/sdl on upstream code non worked reliably
>  for me, in the past it did work, so its probably a regression.
>
>
> > Thanks in advance,
> >
> > Daniel
> >
> >
> >
> > _______________________________________________
> > Fedora-virt mailing list
> > Fedora-virt(a)redhat.com
> > https://www.redhat.com/mailman/listinfo/fedora-virt
> >
>
>

[Cole Robinson]

On 12/30/2009 05:58 AM, Daniel Sanabria wrote:
>  thanks Dor,
>  
>  looking at the logs you seem to have a point:
>  
>  LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none
>  /usr/bin/qemu-kvm -S -M pc-0.11 -m 1024 -smp 1 -name winxp -uuid 8
>  8b53573-a3c1-3e12-8703-ea3fc8580493 -monitor
>  unix:/var/lib/libvirt/qemu/winxp.monitor,server,nowait -localtime -boot c
>  -drive file
>  =/var/lib/libvirt/images/winxp.img,if=ide,index=0,boot=on,format=raw -drive
>  file=/home/daniel/ISO/WINXP_SP2_PRO.iso,if=ide,media=c
>  drom,index=2 -net nic,macaddr=52:54:00:62:66:ed,vlan=0,name=nic.0 -net
>  tap,fd=18,vlan=0,name=tap.0 -serial pty -parallel none -usb
>   -usbdevice tablet -vnc 127.0.0.1:1 -k en-gb -vga cirrus -soundhw es1370
>  
>  I noticed the QEMU_AUDIO_DRV=none variable here which is how virt-manager is
>  trying to start the vm. Shouldn't that be QEMU_AUDIO_DRV=pa in the case of
>  Fedora 12? How can I change that value, so virt-manager starts the vm
>  correctly?
>   
There is some more info here:

https://bugzilla.redhat.com/show_bug.cgi?id=508317

Basically, trying to use the 'pa' backend can upset selinux, and doesn't
easily work if the qemu binary isn't running under the user acct (which
it likely isn't if you are using virt-manager). So, if you are using
VNC, we set QEMU_AUDIO_DRV=none, which will attempt to route audio over
VNC. However the gtk-vnc version in F12 doesn't support the audio
extension yet, so you won't hear anything :(

- Cole

[Daniel Sanabria]

Thanks Cole,

with your comments things are starting to make a bit more of sense to me.

So I now see 2 options:

   1. start qemu with the user account which will potentially mean to stop
   using virt-manager
   2. Install/compile the gtk-vnc version that support the audio extension
   (only if it's already available)

Could you provide some guidance on how to approach any of these options?
i.e. How can I start qemu and the guest manually without using virt-manager?
or is there gtk-vnc version available that supports the audio extension?

Cheers,

Daniel

2010/1/6 Cole Robinson <crobinso(a)redhat.com&gt;

>  On 12/30/2009 05:58 AM, Daniel Sanabria wrote:
>  > thanks Dor,
>  >
>  > looking at the logs you seem to have a point:
>  >
>  > LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none
>  > /usr/bin/qemu-kvm -S -M pc-0.11 -m 1024 -smp 1 -name winxp -uuid 8
>  > 8b53573-a3c1-3e12-8703-ea3fc8580493 -monitor
>  > unix:/var/lib/libvirt/qemu/winxp.monitor,server,nowait -localtime -boot c
>  > -drive file
>  > =/var/lib/libvirt/images/winxp.img,if=ide,index=0,boot=on,format=raw
>  -drive
>  > file=/home/daniel/ISO/WINXP_SP2_PRO.iso,if=ide,media=c
>  > drom,index=2 -net nic,macaddr=52:54:00:62:66:ed,vlan=0,name=nic.0 -net
>  > tap,fd=18,vlan=0,name=tap.0 -serial pty -parallel none -usb
>  >  -usbdevice tablet -vnc 127.0.0.1:1 -k en-gb -vga cirrus -soundhw es1370
>  >
>  > I noticed the QEMU_AUDIO_DRV=none variable here which is how virt-manager
>  is
>  > trying to start the vm. Shouldn't that be QEMU_AUDIO_DRV=pa in the case
>  of
>  > Fedora 12? How can I change that value, so virt-manager starts the vm
>  > correctly?
>  >
>
>  There is some more info here:
>
>  https://bugzilla.redhat.com/show_bug.cgi?id=508317
>
>  Basically, trying to use the 'pa' backend can upset selinux, and doesn't
>  easily work if the qemu binary isn't running under the user acct (which
>  it likely isn't if you are using virt-manager). So, if you are using
>  VNC, we set QEMU_AUDIO_DRV=none, which will attempt to route audio over
>  VNC. However the gtk-vnc version in F12 doesn't support the audio
>  extension yet, so you won't hear anything :(
>
>  - Cole
>

[Cole Robinson]

On 01/06/2010 10:40 AM, Daniel Sanabria wrote:
>  Thanks Cole,
>  
>  with your comments things are starting to make a bit more of sense to me.
>  
>  So I now see 2 options:
>  
>     1. start qemu with the user account which will potentially mean to stop
>     using virt-manager 
This has networking caveats. If you run the qemu binary directly as a
regular user, the easiest setup is -net user, which doesn't actually
have full networking capabilities. You'll want to study up before you
take this route.

>     2. Install/compile the gtk-vnc version that support the audio
> extension
>     (only if it's already available)
>   
Unfortunately that code isn't upstream yet. I know Dan Berrange has
something working to a degree, but it hasn't been posted yet.

>  Could you provide some guidance on how to approach any of these
> options?
>  i.e. How can I start qemu and the guest manually without using virt-manager?
>  or is there gtk-vnc version available that supports the audio extension?
>  
You can also try to use SDL for graphics rather than VNC. This has some
caveats: no remote access via libvirt, the SDL console will pop up
outside of virt-manager, and when the SDL window closes the guest will
be forcibly powered off. I haven't tried this, but AFAIK sound should
work. You can try changing the sdl audio backend in
/etc/sysconfig/libvirtd from 'pa' (pulseaudio) to something else if you
have issues.

Hope that helps,
Cole