[ovirt-users] how to debug no audio in guest?

[Gianluca Cecchi]

Hello,
I'm testing video and audio capacity inside a guest.
Guest chosen is CentOS 6 with latest updates.
oVirt is 3.6.6 on an intel NUC6i5SYH with CentOS 7.2 OS

BTW: is it of any importance audio adapter on the host?
In case lspci on host gives
00:1f.3 Audio device: Intel Corporation Device 9d70 (rev 21)

Client connecting from user portal is Fedora 23 on an Asus laptop U36SD
where audio works and lspci gives
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family
High Definition Audio Controller (rev 05)

On CentOS 6 guest the audio adapter detected by OS with lspci is
00:08.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
High Definition Audio Controller (rev 01)

It seems all ok, apart that on guest actually I don't get any audio, also
from test speakers page ;-)
Both on guest and on client the volume bar is near the maximum.

Any hints about debugging?
>From host point of view the qemu-kvm command line is this one below

I don't understand the env variable
QEMU_AUDIO_DRV=none
???

If it can be of any importance, I initially configured the guest without
sound card and in fact in gnome I saw the audio card as "dummy".
Then I powered off the guest and enabled sound card from user portal edit
vm (I see it enabled also from admin portal btw...) and then powered on the
VM.
Now the sound card seems to be present but no audio

Thanks in advance,
Gianluca

2016-06-11 09:22:13.698+0000: starting up libvirt version: 1.2.17, package:
13.el7_2.4 (CentOS BuildSystem <http://bugs.centos.org>, 2016-03-
31-16:56:26, worker1.bsys.centos.org), qemu version: 2.3.0
(qemu-kvm-ev-2.3.0-31.el7_2.10.1)
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm -name c6desktop -S -machine
pc-i440
fx-rhel7.2.0,accel=kvm,usb=off -cpu Broadwell-noTSX -m
size=3145728k,slots=16,maxmem=4294967296k -realtime mlock=off -smp
1,maxcpus=16,socket
s=16,cores=1,threads=1 -numa node,nodeid=0,cpus=0,mem=3072 -uuid
68a82ada-a1d2-44d0-85b0-f3a08cc2f579 -smbios type=1,manufacturer=oVirt,produ
ct=oVirt
Node,version=7-2.1511.el7.centos.2.10,serial=AC1EDDD3-CAF1-2711-EE16-B8AEED7F1711,uuid=68a82ada-a1d2-44d0-85b0-f3a08cc2f579
-no-user
-config -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-c6desktop/monitor.sock,server,nowait
-mon chardev=charmo
nitor,id=monitor,mode=control -rtc base=2016-06-11T09:22:13,driftfix=slew
-global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -boo
t menu=on,strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x9.0x7
-device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x
9.0x2 -device
ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x9.0x1 -device
ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,
multifunction=on,addr=0x9 -device
virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x3 -device
virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pc
i.0,addr=0x4 -drive if=none,id=drive-ide0-1-0,readonly=on,format=raw
-device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -drive
file=/rhev/data-center/00000001-0001-0001-0001-000000000343/572eabe7-15d0-42c2-8fa9-0bd773e22e2e/images/aff55e62-6a41-4f75-bbd3-78561eae18f3/
f520473e-8fbe-4886-bb64-921b42edf499,if=none,id=drive-virtio-disk0,format=raw,serial=aff55e62-6a41-4f75-bbd3-78561eae18f3,cache=none,werror=s
top,rerror=stop,aio=threads -device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-netdev t
ap,fd=28,id=hostnet0,vhost=on,vhostfd=29 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=00:1a:4a:16:01:51,bus=pci.0,addr=0x7
-chardev soc
ket,id=charserial0,path=/var/run/ovirt-vmconsole-console/68a82ada-a1d2-44d0-85b0-f3a08cc2f579.soc
k,server,nowait -device isa-serial,chardev=charserial0,id=serial0 -chardev
socket,id=charchannel0,path=/var/lib/libvirt/qemu/channels/68a82ada-a1d2-44d0-85b0-f3a08cc2f579.com.redhat.rhevm.vdsm,server,nowait
-device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.rhevm.vdsm
-chardev
socket,id=charchannel1,path=/var/lib/libvirt/qemu/channels/68a82ada-a1d2-44d0-85b0-f3a08cc2f579.org.qemu.guest_agent.0,server,nowait
-device
virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=org.qemu.guest_agent.0
-chardev spicevmc,id=charchannel2,name=vdagent -device
virtserialport,bus=virtio-serial0.0,nr=3,chardev=charchannel2,id=channel2,name=com.redhat.spice.0
-spice
port=5901,tls-port=5902,addr=0,x509-dir=/etc/pki/vdsm/libvirt-spice,seamless-migration=on
-vnc 0:3,password -device
qxl-vga,id=video0,ram_size=67108864,vram_size=8388608,vgamem_mb=16,bus=pci.0,addr=0x2
-device intel-hda,id=sound0,bus=pci.0,addr=0x8 -device
hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev
spicevmc,id=charredir0,name=usbredir -device
usb-redir,chardev=charredir0,id=redir0 -chardev
spicevmc,id=charredir1,name=usbredir -device
usb-redir,chardev=charredir1,id=redir1 -chardev
spicevmc,id=charredir2,name=usbredir -device
usb-redir,chardev=charredir2,id=redir2 -chardev
spicevmc,id=charredir3,name=usbredir -device
usb-redir,chardev=charredir3,id=redir3 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 -msg timestamp=on
2016-06-11T09:22:13.748410Z qemu-kvm: warning: CPU(s) not present in any
NUMA nodes: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
2016-06-11T09:22:13.748524Z qemu-kvm: warning: All CPU(s) up to maxcpus
should be described in NUMA config
main_channel_link: add main channel client
main_channel_handle_parsed: net test: latency 21.910000 ms, bitrate
51635025 bps (49.242997 Mbps)
inputs_connect: inputs channel client create
red_dispatcher_set_cursor_peer:
main_channel_handle_parsed: agent start
main_channel_handle_parsed: agent start
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