no sound from QEMU/KVM virtual machine

[Shadow_Fury]

title says it all.

i've recently installed virt-manager and used it to create a QEMU kvm. all is well so far. the issue is, i can't get audio out of the VM


any help is appreciated

[alamahant]

Plz make sure qemu is built with both "alsa pulseaudio" and your user is is member of audio video and libvirt groups
Which guest?
_________________

[Shadow_Fury]

currently re-compiling qemu. and the guest is manjaro

[Shadow_Fury]

nope, still nothing

[szatox]

Do you even have an audio device inside your VM?
I don't think it's included by default.

[Hu]

If you need help, please provide information we can use to help you. At present, we don't know:

• What version of any of these components you are using
• How you configured the virtual hardware
• Where to obtain exact copies of any of the things not in Portage. I could go find a Manjaro guest, but would it be the same one you're using? I have no way to know.
• Whether you have working sound on the host from, for example, vlc.
• Whether qemu is properly set up to drive the host speakers when it detects sound on the guest's speakers
• How you are playing audio in the guest
• Whether the guest has virtual speakers into which it can play
• Whether the guest is playing into these speakers, versus to some dummy device. If the guest is not driving its virtual speakers, then there is nothing for Qemu to play through the real sound device.

[Shadow_Fury]

Right, here is my long list of everything I know about the system

• What version of any of these components you are using
  
  eix indicates the following versions:
  

  Code:

  qemu:               6.2.0-r3 libvirt:            7.10.0-r2 virt-manager:       3.2.0

  
  
  
• How you configured the virtual hardware
  
  I did not configure any hardware myself, other than giving it 4 cpu cores and 8 gb of ram, but I will list what I believe to be the important details that virt-manager set automatically.
  

  Code:

  Virtual audio hardware:  intel HDA(ich9) Display Spice:           {Type: SPICE server; Listen Type: Address; Address: Localhost Only; port: Automatic (5900)} Serial 1:                {Device Type: pty; Source Path: /dev/pts/5} Channel Device qemu-ga:  {Device Type: unix; Source Path: /var/lib/libvirt/qemu/channel/target/domain-1-manjaro/org.qemu.auest_agent.0; Target type: virtio; Target Name: org.qemu.guest_agent.0} [note: state listed as connected when machine is running] Channel Spice:           {Device Type: spicevmc; Target Type: virtio; Target name: com.redhat.spice.0} [note: state listed as disconnected when machine is running]

  
  
  
• Where to obtain exact copies of any of the things not in Portage. I could go find a Manjaro guest, but would it be the same one you're using? I have no way to know.
  
  the manjaro guest was created from the manjaro-kde-21.1.0-minimal-210817-linux52 ISO, which was downloaded from the official torrent. after that, i ran the installer, then updated all packages using pacman. i also installed the spice-gtk and spice-vdagent packages on the guest.
  
  
• Whether you have working sound on the host from, for example, vlc.
  
  I can't say from VLC, but i have had no sound issues on the host, be it from steam games (both native and proton), browsers playing videos or, KDE plasma system tolls, like the pop when changing audio levels.
  
  
• Whether qemu is properly set up to drive the host speakers when it detects sound on the guest's speakers
  
  not sure how to verify this
  
  
• How you are playing audio in the guest
  
  i have tried playing audio from both the browser, and by changing the audio level in manjaro plasma's settings, which both result in a visual reaction from plasma's built in audio visualizer ( the one present in the volume menu options), meaning the guest sound sink is receiving audio
  
  
• Whether the guest has virtual speakers into which it can play
  
  that i don't know, the only thing that shows up in the devices tab is a line out (and a microphone), though lspci (on guest) does indicate the presence of an intel HDA(ic9) device. (verified by arecord -l, listing an intel HDA device as the only capture device)
  
  
• Whether the guest is playing into these speakers, versus to some dummy device. If the guest is not driving its virtual speakers, then there is nothing for Qemu to play through the real sound device.
  
  this i, again, don't know how to verify.
  
  

[mrbassie]

[Shadow_Fury]