No sound from VM (Windows 7) on qemu with virt-manager

I have installed Windows 7 (64bit) on qemu with virt-manager.
It seems that audio works fine inside the guest os, but I can hear no sound.
[Guest]
Guest os: Windows 7 (64 bit)
Sound driver: ich6
Console: Spice (VNC doesn't work.)
[Host]
linux 3.12.8-1 (base)
qemu 1.7.0-1
virt-manager 0.10.0-4
libvirt 1.2.1-1
According to
https://bbs.archlinux.org/viewtopic.php?id=157604
I did as follow before launch the VM, but it doesn't solve the problem.
export QEMU_AUDIO_DRV=alsa
What shoud I check and do?
For additional information,
% ps aux | grep kvm [~]
root 252 0.0 0.0 0 0 ? S< 02:25 0:00 [kvm-irqfd-clea
n]
nobody 10199 63.0 27.0 1613768 1070088 ? Sl 11:31 0:34 /usr/sbin/qemu-system-x86_64 -name win7qemu002 -S -machine pc-i440fx-1.7,accel=kvm,usb=off -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 00b5056b-9055-aa4f-d7a6-aef72cc8edd4 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/win7qemu002.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -no-shutdown -boot menu=off,strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 -drive file=/mnt/win/win7qemu002,if=none,id=drive-ide0-0-0,format=raw -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -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 -netdev tap,fd=22,id=hostnet0 -device e1000,netdev=hostnet0,id=net0,mac=08:00:27:8f:ff:84,bus=pci.0,addr=0x7,bootindex=1 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0 -spice port=5900,addr=127.0.0.1,disable-ticketing,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2 -device intel-hda,id=sound0,bus=pci.0,addr=0x3 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
root 10201 0.0 0.0 0 0 ? S 11:31 0:00 [kvm-pit/10199]
taro 10340 0.0 0.0 10668 1060 pts/2 S+ 11:32 0:00 grep kvm
* If I put the same command above
% /usr/sbin/qemu-system-x86_64 -name win7qemu002...
It produces error.
char device redirected to /dev/pts/4 (label charserial0)
Could not access KVM kernel module: Permission denied
failed to initialize KVM: Permission denied
* According to the someone's discussion,
I added my user to kvm group
% sudo gpasswd -a taro kvm
or edited /etc/libvirt/qemu.conf, but they don't fix this errors.
% sudo vi /etc/libvirt/qemu.conf
- #user = "root"
+ user = "taro"
* Everytime I launch the virt-manager,
a dialog "Authentication" pops-up and asks
for my user password (not root password).
best regards.
Last edited by taro (2014-06-29 02:54:25)

I'm having the same issue. Not running Windows though... I have a minimal Ubuntu 14.04 as the guest (Arch as the host.) Been trying everything I can think of but I can't get any sound in virt-manager. Like you said, the sound seems to play OK in the guest, it's recognizing the card, volume is turned up but no sound. It has to be an issue with my host configuration but I'm not sure what. I can get sound to play in the same guest if I launch qemu directly and use ac97. Something's gotta just be misconfigured with virt-manager/libvirt/Spice. I thought a permissions issue at first since by default it runs as the "nobody" user but I even tried the foolish thing of setting /etc/libvirt/qemu.conf so qemu runs as root... still no go. I'd really like to use virt-manager for the nice GUI, presistant settings, and extra features like Spice and the QXL driver that enables KMS on the guest.

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[Solved] No sound from VM (Windows 7) on qemu with virt-manager

I posted this in Newbie corner,
https://bbs.archlinux.org/viewtopic.php?id=176131
but let me re-post here becase it is about sound matter.
I have installed Windows 7 (64bit) on qemu with virt-manager.
It seems that audio works fine inside the guest os, but I can hear no sound.
[Guest]
Guest os: Windows 7 (64 bit)
Sound driver: ich6
Console: Spice (VNC doesn't work.)
[Host]
linux 3.12.8-1 (base)
qemu 1.7.0-1
virt-manager 0.10.0-4
libvirt 1.2.1-1
According to
https://bbs.archlinux.org/viewtopic.php?id=157604
I did as follow before launch the VM, but it doesn't solve the problem.
export QEMU_AUDIO_DRV=alsa
What shoud I check and do?
Followings are some additional information:
* If I put the same command above
% /usr/sbin/qemu-system-x86_64 -name win7qemu002...
It produces error.
char device redirected to /dev/pts/4 (label charserial0)
Could not access KVM kernel module: Permission denied
failed to initialize KVM: Permission denied
* According to the someone's discussion,
I added my user to kvm group
% sudo gpasswd -a taro kvm
or edited /etc/libvirt/qemu.conf, but they don't fix this errors.
% sudo vi /etc/libvirt/qemu.conf
- #user = "root"
+ user = "taro"
* Everytime I launch the virt-manager,
a dialog "Authentication" pops-up and asks
for my user password (not root password).
% ps aux | grep kvm [~]
root 252 0.0 0.0 0 0 ? S< 02:25 0:00 [kvm-irqfd-clea
n]
nobody 10199 63.0 27.0 1613768 1070088 ? Sl 11:31 0:34 /usr/sbin/qemu-system-x86_64 -name win7qemu002 -S -machine pc-i440fx-1.7,accel=kvm,usb=off -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 00b5056b-9055-aa4f-d7a6-aef72cc8edd4 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/win7qemu002.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -no-shutdown -boot menu=off,strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 -drive file=/mnt/win/win7qemu002,if=none,id=drive-ide0-0-0,format=raw -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -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 -netdev tap,fd=22,id=hostnet0 -device e1000,netdev=hostnet0,id=net0,mac=08:00:27:8f:ff:84,bus=pci.0,addr=0x7,bootindex=1 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -device usb-tablet,id=input0 -spice port=5900,addr=127.0.0.1,disable-ticketing,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2 -device intel-hda,id=sound0,bus=pci.0,addr=0x3 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
root 10201 0.0 0.0 0 0 ? S 11:31 0:00 [kvm-pit/10199]
taro 10340 0.0 0.0 10668 1060 pts/2 S+ 11:32 0:00 grep kvm
Last edited by taro (2014-02-15 12:36:43)

Self reply.
Finally, I got to hear sound from windows 7 as guest OS.
I gave up to use virt-manager and launches OS image by command line
like follows.
% export QEMU_AUDIO_DRV=alsa
% qemu-system-x86_64 /mnt/win/win7qemu002 -cpu kvm64,+nx -enable-kvm -m 1536 -soundhw hda -usb
Then, sounds works good.
# However, the quality is bad because of heavy CPU load.
Virt-manager may make things complex..
Sorry for the duplicated post.
https://bbs.archlinux.org/viewtopic.php?pid=1373935
Last edited by taro (2014-02-15 12:36:19)

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No sound from VM (Windows 7) on qemu with virt-manager

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