[vfio-users] QEMU_ALSA _*values

[Feadurn]

I found how to do it (I have other errors now but at least it looks like 
I can export).

I am with archlinux and I launch libivirtd with systemctl so the 
explanations are for this way to launch libvirtd

There is two options to uncomment in the file /etc/libvirt/qemu.conf
uncomment the following lines and be sure to put them equal to 1:*
*

    *vnc_allow_host_audio = 1 *

and further down *
*

    *nographics_allow_host_audio = 1*


This options will stop libvirt to set up QEMU_AUDIO_DRV=none but to 
export the environment variable you need to change another file

edit the file: */usr/lib/systemd/system/libvirtd.service*
and under the [Service] section add the linde
*    Environment=export QEMU_AUDIO_DRV=alsa

*If you check your log in /var/log/libvirt/qemu/yourdomain.log you 
should see that the environment variable is activate.

However, as said, I face others issues now:

    Home directory not accessible: Permission denied
    ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
    ALSA lib conf.c:4292:(_snd_config_evaluate) function
    snd_func_card_driver returned error: No such file or directory
    ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
    ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_concat
    returned error: No such file or directory
    ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
    ALSA lib conf.c:4292:(_snd_config_evaluate) function snd_func_refer
    returned error: No such file or directory
    ALSA lib conf.c:4771:(snd_config_expand) Evaluate error: No such
    file or directory
    ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM sysdefault
    alsa: Could not initialize ADC
    alsa: Failed to open `default':
    alsa: Reason: No such file or directory
    audio: Failed to create voice `ac97.pi'

So I don't know if it is linked to the way I export the variable or not. 
I haven't check that but I thought you may want to know how to do it.

Regards.

Feadurn





On 08/12/15 05:18, Okky Hendriansyah wrote:
> On December 8, 2015 at 06:24:29, Feadurn (feadurn at gmail.com 
> <mailto:feadurn at gmail.com>) wrote:
>> I am still a little bit lost on the way to activate the "export
>> QEMU_AUDIO_DRV=alsa" when using libvirtd. There is an option in
>> libvirt/qemu.conf : nographics_allow_host_audio=1. Do I just need to
>> uncomment that line?
>>
>> Thank you very much
>
> Hi Feadurn,
>
> That was one of my reasons I haven’t migrate all my QEMU script to 
> libvirt. I had issues enabling the host audio like I use in my plain 
> QEMU script. If you’re using Alex’ wrapper script way [1], probably 
> you can regex replace it with ALSA. I never tried myself though.
>
> Reading the description,
>
> # By default, if no graphical front end is configured, libvirt will 
> disable
> # QEMU audio output since directly talking to alsa/pulseaudio may not work
> # with various security settings. If you know what you're doing, enable
> # the setting below and libvirt will passthrough the QEMU_AUDIO_DRV
> # environment variable when using nographics.
>
> I think that option is worth to try. Thanks for pointing this.
>
>
> [1] http://vfio.blogspot.com/2015/05/vfio-gpu-how-to-series-part-5-vga-mode.html
>
> -- 
> *Okky Hendriansyah*
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20151208/97b9beea/attachment.htm>