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umka69
Tux's lil' helper
Joined: 31 Mar 2013
Posts: 124
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 Posted: Sat Sep 26, 2015 8:34 pm Post subject: [SOLVED] QEMU guest sound support |
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Hello!
I'm working on sound support in a guest system.
The host is Gentoo amd64, the guest is Windows x64.
Here is my start script. Audio support is not working here - the guest can not see audio device.
| Code: | rolan@home ~ $ cat start.sh
#!/bin/sh
exec qemu-system-x86_64 \
-enable-kvm -cpu host -smp 4 -m 6G \
-device intel-hda, -soundhw hda \
-vga std \
-boot d \
-drive file="/dev/repo/microsoft-desktop",if=virtio \
-monitor stdio -name "Windows 10 x64" \
-k en-us \
-vnc :0,password \
"$@" |
Runnig...
| Code: | rolan@home ~ $ sudo start.sh
QEMU 2.4.0 monitor - type 'help' for more information
(qemu) ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.0.29/work/alsa-lib-1.0.29/src/pcm/pcm_dmix.c:1024:(snd_pcm_dmix_open) unable to open slave
sdl: SDL_OpenAudio failed
sdl: Reason: No available audio device
sdl: SDL_OpenAudio failed
sdl: Reason: No available audio device
audio: Failed to create voice `dac'
audio: Failed to create voice `adc'
(qemu) |
Host sound works good (mplayer runs without errors), but the speaker-test runs with an error:
| Code: | rolan@home ~ $ speaker-test -t wav -c 2
speaker-test 1.0.29
Playback device is default
Stream parameters are 48000Hz, S16_LE, 2 channels
WAV file(s)
ALSA lib /var/tmp/portage/media-libs/alsa-lib-1.0.29/work/alsa-lib-1.0.29/src/pcm/pcm_hw.c:1693:(_snd_pcm_hw_open) Invalid value for card
Playback open error: -19,No such file or directory |
Can you advice something please?  A have tried a lot of combinations of arguments and kerner drivres.
Where it comes from?
_________________
Make a wish, this text is magic. 
Last edited by umka69 on Sun Sep 27, 2015 10:11 pm; edited 1 time in total |
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umka69
Tux's lil' helper
Joined: 31 Mar 2013
Posts: 124
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| Posted: Sun Sep 27, 2015 1:30 pm Post subject: |
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I've got it. 
At first it used not to have all necessary use flags. Here is the full story.
Than I missed that sudo command means root user environment, so all user configuration are not available.
The solution is to copy all alsa user configuration to root.
| Code: | rolan@home ~ $ cat .asoundrc
defaults.pcm.card 1
defaults.pcm.device 0
rolan@home ~ $ sudo cp .asoundrc /root/ |
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