[vfio-users] Non-root Passthrough Audio with libvirt

[Nick Sarnie]

I managed to solve this. You run pulse as the user, with anonymous auth and
a unix socket at /tmp/pulse. Then, set PULSE_SERVER=unix:/tmp/pulse in the
envvars for the domain xml. Works from there.

On Sun, Apr 17, 2016 at 11:45 PM, Nick Sarnie <commendsarnex at gmail.com>
wrote:

> Hi guys,
>
> I'm using libvirt and virt-manager for my GPU passthrough setup, with
> no-root. For the life of me, I can't figure out how to get pulseaudio
> working. Even though it is running as user, libvirt is trying to look in
> /root for pulse config files. The VM shows I have an audio device
> connected, but there is no sound passes through to me on the host. If I use
> a script with no libvirt, it works fine. If I use libvirt with no gpu
> passthrough, it works fine. I've pasted the log below. Please let me know
> if you have any ideas.
>
> Thanks,
> sarnex
>
>
> Home directory not accessible: Permission denied
> W: [pulseaudio] core-util.c: Failed to open configuration file
> '/root/.config/pulse//daemon.conf': Permission denied
> W: [pulseaudio] daemon-conf.c: Failed to open configuration file:
> Permission denied
> pulseaudio: pa_context_connect() failed
> pulseaudio: Reason: Connection refused
> pulseaudio: Failed to initialize PA contextaudio: Could not init `pa'
> audio driver
> Home directory not accessible: Permission denied
> W: [pulseaudio] core-util.c: Failed to open configuration file
> '/root/.config/pulse//daemon.conf': Permission denied
> W: [pulseaudio] daemon-conf.c: Failed to open configuration file:
> Permission denied
> audio: Failed to create voice `ac97.pi'
> Home directory not accessible: Permission denied
> W: [pulseaudio] core-util.c: Failed to open configuration file
> '/root/.config/pulse//daemon.conf': Permission denied
> W: [pulseaudio] daemon-conf.c: Failed to open configuration file:
> Permission denied
> ALSA lib
> /var/tmp/portage/media-libs/alsa-lib-1.1.1/work/alsa-lib-1.1.1/src/pcm/pcm_dmix.c:1029:(snd_pcm_dmix_open)
> unable to open slave
> sdl: SDL_OpenAudio failed
> sdl: Reason: ALSA: Couldn't open audio device: Device or resource busy
> ALSA lib
> /var/tmp/portage/media-libs/alsa-lib-1.1.1/work/alsa-lib-1.1.1/src/pcm/pcm_dmix.c:1029:(snd_pcm_dmix_open)
> unable to open slave
> sdl: SDL_OpenAudio failed
> sdl: Reason: ALSA: Couldn't open audio device: Device or resource busy
> audio: Failed to create voice `ac97.po'
> audio: Failed to create voice `ac97.mc'
> audio: Failed to create voice `ac97.pi'
> ALSA lib
> /var/tmp/portage/media-libs/alsa-lib-1.1.1/work/alsa-lib-1.1.1/src/pcm/pcm_dmix.c:1029:(snd_pcm_dmix_open)
> unable to open slave
> sdl: SDL_OpenAudio failed
> sdl: Reason: ALSA: Couldn't open audio device: Device or resource busy
> ALSA lib
> /var/tmp/portage/media-libs/alsa-lib-1.1.1/work/alsa-lib-1.1.1/src/pcm/pcm_dmix.c:1029:(snd_pcm_dmix_open)
> unable to open slave
> sdl: SDL_OpenAudio failed
> sdl: Reason: ALSA: Couldn't open audio device: Device or resource busy
> audio: Failed to create voice `ac97.po'
> audio: Failed to create voice `ac97.mc'
> 2016-04-18T02:27:04.033280Z qemu-system-x86_64: terminating on signal 15
> from pid 5395
> 2016-04-18 02:27:05.634+0000: shutting down
>
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