On Fri, Aug 26, 2016 at 1:37 AM, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:
On Thu, Aug 25, 2016 at 5:17 PM, Jakub Niedermertl <jniederm@redhat.com> wrote:
Hi Gianluca,

QEMU_AUDIO_DRV=none is most probably the problem. Libvirt is supposed to set "QEMU_AUDIO_DRV" to "spice" for VMs with graphics. Please make sure that the "Optimize for" attribute is set to "Desktop" (in Edit VM dialog) and try to shutdown and start the VM again. If the QEMU process will still have QEMU_AUDIO_DRV=none set, you can try to set the variable in /etc/sysconfig/libvirtd by adding line "QEMU_AUDIO_DRV=spice" and restart the libvirtd service.

Jakub


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Apparently all is the same in qemu-kvm command lines, comparing c6 with c7 one, but I don't understand who drives instead the QEMU_AUDIO_DRV=XXX in log file that is different between the two guests (none vs spice) and btw also in f24 it is spice:


[snip]

Understood!
Actually CentOS 6 guest graphics protocol was configured as "SPICE + VNC" and this was the reason of "QEMU_AUDIO_DRV=none"
Changing it to "SPICE", now I have "QEMU_AUDIO_DRV=spice" in guest logfile and also test speakers working inside guest.

Is this expected? I thought that the "+" would have given an aggregate of functionalities, not a limitation... because initialy I wanted to test both spice and vnc access...
If this is the case, probably a note or tool-tip could be useful for the final user because it is not so immediate to correlate video with audio...

Gianluca