[fedora-virt] Sound not working on vm clients

[David Highley]

"Cole Robinson wrote:"
> 
> On 06/18/2012 11:05 PM, David Highley wrote:
> > "Cole Robinson wrote:"
> >>
> >> On 06/17/2012 06:23 PM, David Highley wrote:
> >>> "Cole Robinson wrote:"
> >>>>
> >>>> On 06/16/2012 10:06 PM, David Highley wrote:
> >>>>> We have two vm clients and neither have sound.
> >>>>> hosting platform is Fedora 16 x86_64
> >>>>> first client is Fedora 17 i686
> >>>>> second client is Ubuntu 12.04 i686
> >>>>>
> >>>>> libvirt-0.9.6-5.fc16.x86_64
> >>>>> qemu-kvm-0.15.1-5.fc16.x86_64
> >>>>>
> >>>>> Tried both VNC and Spice modes. Did set, vnc_allow_host_audio = 1, in
> >>>>> /etc/libvirt/qemu.conf file. Just in case we put selinux in Permissive
> >>>>> mode. Still no sound.
> >>>>>
> >>>>
> >>>> On F16, using SPICE is the only good way to get sound, so do your testing with
> >>>> that. Please provide the following info
> >>>>
> >>>> - How are you connecting to the guest console?
> >>>> - sudo virsh dumpxml $vmname
> >>>> - sudo cat /var/log/libvirt/qemu/$vmname.log
> >>>
> >>> I did switch to using SPICE and both the host and quest show the same
> >>> audio configuration. Attached the two requested files.
> >>>
> >>
> >> Your qemu log file only shows guest config when the VM was configured with
> >> VNC. Please try running with spice, and see if that works. If not, attach the
> >> log file after running with spice enabled.
> > 
> > Got it working after a pointer about QEMU_AUDIO_DRV=none. Lots of
> > postings without solutions. Finally found we could define
> > QEMU_AUDIO_DRV=pa in /etc/sysconfig/libvirtd. Sound is now working.
> > 
> 
> Hmm, did you have QEMU_AUDIO_DRV=none set in /etc/sysconfig/libvirtd before
> that change? If so, does just commenting out everything in that file make
> things work? If using Spice, libvirt should be passing QEMU_AUDIO_DRV=spice
> automatically, which sends the audio stream through the spice connection, so
> sound is played by the client (virt-manager, spicec, virt-viewer). This is the
> ideal solution, since it handles permissions correctly, and allows hearing
> local sound from VMs on remote machines.

Nothing was set in the /etc/sysconfig/libvirtd file. Thanks for the
information about QEMU_AUDIO_DRV=spice. Still looking for better
documentation about all this. The host is Fedora 16 so some of the
default behavior maybe changing in Fedora 17 and beyond.

> 
> > There are choices for video with no information about picking one over
> > any other. We left it default to cirrus. It might make a difference on
> > the 3D graphics issue, but we have not found any information about
> > making choices here. Thanks for the help.
> > 
> 
> The default in Fedora should be QXL + Spice, but it was busted for a while in
> virt-manager.

In Fedora 16 it defaults to VNC mode. If you change an existing guest to
use spice it does not do anything with the video setting. Just upgraded
a box to Fedora 17 so we will check and see defaults and behavior is
with the new host.

> 
> - Cole
>