Sound doesn't work on VE 2.x

[dominique.fournier]

Hi,

I just try to allow a VM to play sound on the host. But it doesn't works.

When I start the VM manually, I have :
oss: Could not initialize DAC
oss: Failed to open `/dev/dsp'
oss: Reason: No such file or directory
oss: Could not initialize DAC
oss: Failed to open `/dev/dsp'
oss: Reason: No such file or directory
audio: Failed to create voice `es1370.dac2'
oss: Could not initialize ADC
oss: Failed to open `/dev/dsp'
oss: Reason: No such file or directory
oss: Could not initialize ADC
oss: Failed to open `/dev/dsp'
oss: Reason: No such file or directory
audio: Failed to create voice `es1370.adc'

KVM is compiled only for OSS (and not alsa) :
/usr/bin/kvm -audio-help | grep ^Name
Name: oss
Name: none
Name: wav

And the kernel don't have the OSS support :
grep SND_PCM_OSS /boot/config-2.6.32-13-pve
# CONFIG_SND_PCM_OSS is not set
So I can't have the /dev/dsp device loaded...

So : could you add alsa support to KVM or OSS support to kernel ?

Thanks a lot !!

Dom

 

[spirit]

Hi,
this is simply because they are no virtual sound card in the kvm guest.
proxmox doesn't have configuration for it.
you can try to edit your vm config file, and add

args: -device intel-hda

 

[dominique.fournier]

Of course, I do that with -soundhw es1370 and/or -device intel-hda, but it doesn't works. I have a standard debian on another plateform, and it works because, when I launch the VM, there is no error concerning /dev/dsp...

Thanks a lot

 

[dominique.fournier]

Hi

I just try to recompile the package pve-qemu-kvm with the following patch and it works well !! Just ALSA support and no more OSS, and the sound works out of box.

Could you integrate it for the next release ?

Thanks !!

Dom

--- debian/rules.old    2012-08-14 09:37:19.000000000 +0200
+++ debian/rules    2012-08-14 09:38:07.000000000 +0200
@@ -33,7 +33,7 @@
 config.status: configure
     dh_testdir
     # Add here commands to configure the package.
-    ./configure --prefix=/usr --datadir=/usr/share --docdir=/usr/share/doc/pve-qemu-kvm --sysconfdir=/etc --disable-xen --enable-vnc-tls --enable-sdl --enable-uuid --enable-linux-aio --enable-rbd --enable-libiscsi
+    ./configure --prefix=/usr --datadir=/usr/share --docdir=/usr/share/doc/pve-qemu-kvm --sysconfdir=/etc --disable-xen --enable-vnc-tls --enable-sdl --enable-uuid --enable-linux-aio --enable-rbd --enable-libiscsi --audio-drv-list=alsa
 
 build: patch build-stamp

 

[spirit]

can you make a bugreport ?
bugzilla.proxmox.com

I'll try to add it as soon as possible.

does it works in windows vm ?

 

[spirit]

I see that debian qemu-kvm build with

--audio-drv-list="alsa oss sdl pa"

(default is only oss).

Maybe can we add this ?

 

[dominique.fournier]

https://bugzilla.proxmox.com/show_bug.cgi?id=241

 

[dominique.fournier]

If you can allow all the supports, I should be fine ! Actually, the kernel supports only ALSA, but it is great. I think you will need more libraries to do that.

Thanks a lot !!

 

[spirit]

Thanks, Merci

 

[dominique.fournier]

Yes !!! It works !!! Thanks a lot for your action.