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  • [gentoo-user] Audio stopped working in KVM with libvirtmanager

    From Nikos Chantziaras@21:1/5 to All on Sat May 7 15:50:02 2022
    Audio in KVM (qemu) launched through libvirtmanager used to work fine
    last time I used it (about 3 months ago.) There has been lots of updates
    since then, including a switch from Pulseaudio to Pipewire, and
    something along the way broke it. Now I get no sound whatsoever. qemu
    doesn't even show up as an application in the audio mixer, nor in the
    output of "pw-top".

    If I launch the VM directly through qemu with:

    qemu-system-x86_64 [...] -audiodev id=audio1,driver=pa

    then it works fine. But if I launch it through libvirtmanager, it
    doesn't. Even if I force the use of "-audiodev id=audio1,driver=pa" in
    the XML of the VM in /etc/libvirt/qemu/, it still doesn't work. There's
    no error anywhere, no warning, nothing in the logs.

    Does anyone have any idea what to do?

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    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Michael@21:1/5 to All on Wed May 11 19:33:40 2022
    On Saturday, 7 May 2022 14:45:06 BST Nikos Chantziaras wrote:
    Audio in KVM (qemu) launched through libvirtmanager used to work fine
    last time I used it (about 3 months ago.) There has been lots of updates since then, including a switch from Pulseaudio to Pipewire, and
    something along the way broke it. Now I get no sound whatsoever. qemu
    doesn't even show up as an application in the audio mixer, nor in the
    output of "pw-top".

    If I launch the VM directly through qemu with:

    qemu-system-x86_64 [...] -audiodev id=audio1,driver=pa

    then it works fine. But if I launch it through libvirtmanager, it
    doesn't. Even if I force the use of "-audiodev id=audio1,driver=pa" in
    the XML of the VM in /etc/libvirt/qemu/, it still doesn't work. There's
    no error anywhere, no warning, nothing in the logs.

    Does anyone have any idea what to do?

    I don't use libvirt, but use QEMU from a console. For the last couple of versions I have been getting these sort of notices when I launch a Win10 VM:

    ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.2.6.1/work/alsa-lib-1.2.6.1/ src/pcm/pcm.c:8568:(snd_pcm_recover) underrun occurred

    I don't have pulseaudio on this PC, only alsa modules and pipewire with
    default settings. The VM audio works, but it clips. I haven't looked into it yet, because audio in VM is less of an issue for my use case, hence I have no useful suggestions (yet). :-)

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    * Origin: fsxNet Usenet Gateway (21:1/5)