I'm trying to setup a media center using linux, and I've got the video
working OK, and analog stereo output is working OK. However, I want to
get the little "digital" light to turn on when I'm playing a DVD. So far,
I've spent many hours trying to figure this out to no avail. I'm tempted
to update the ALSA wiki page on this topic to say "Don't bother!" but
that's just because I'm feeling so frustrated.
# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC880 Analog [ALC880 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 2: ALC880 Digital [ALC880 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
# cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xfdff8000 irq 169
# find /proc/asound
/proc/asound
/proc/asound/Intel
/proc/asound/card0
/proc/asound/card0/oss_mixer
/proc/asound/card0/id
/proc/asound/card0/codec#2
/proc/asound/card0/pcm2p
/proc/asound/card0/pcm2p/sub0
/proc/asound/card0/pcm2p/sub0/prealloc
/proc/asound/card0/pcm2p/sub0/status
/proc/asound/card0/pcm2p/sub0/sw_params
/proc/asound/card0/pcm2p/sub0/hw_params
/proc/asound/card0/pcm2p/sub0/info
/proc/asound/card0/pcm2p/info
/proc/asound/card0/pcm1c
/proc/asound/card0/pcm1c/oss
/proc/asound/card0/pcm1c/sub1
/proc/asound/card0/pcm1c/sub1/prealloc
/proc/asound/card0/pcm1c/sub1/status
/proc/asound/card0/pcm1c/sub1/sw_params
/proc/asound/card0/pcm1c/sub1/hw_params
/proc/asound/card0/pcm1c/sub1/info
/proc/asound/card0/pcm1c/sub0
/proc/asound/card0/pcm1c/sub0/prealloc
/proc/asound/card0/pcm1c/sub0/status
/proc/asound/card0/pcm1c/sub0/sw_params
/proc/asound/card0/pcm1c/sub0/hw_params
/proc/asound/card0/pcm1c/sub0/info
/proc/asound/card0/pcm1c/info
/proc/asound/card0/pcm0c
/proc/asound/card0/pcm0c/oss
/proc/asound/card0/pcm0c/sub1
/proc/asound/card0/pcm0c/sub1/prealloc
/proc/asound/card0/pcm0c/sub1/status
/proc/asound/card0/pcm0c/sub1/sw_params
/proc/asound/card0/pcm0c/sub1/hw_params
/proc/asound/card0/pcm0c/sub1/info
/proc/asound/card0/pcm0c/sub0
/proc/asound/card0/pcm0c/sub0/prealloc
/proc/asound/card0/pcm0c/sub0/status
/proc/asound/card0/pcm0c/sub0/sw_params
/proc/asound/card0/pcm0c/sub0/hw_params
/proc/asound/card0/pcm0c/sub0/info
/proc/asound/card0/pcm0c/info
/proc/asound/card0/pcm0p
/proc/asound/card0/pcm0p/oss
/proc/asound/card0/pcm0p/sub0
/proc/asound/card0/pcm0p/sub0/prealloc
/proc/asound/card0/pcm0p/sub0/status
/proc/asound/card0/pcm0p/sub0/sw_params
/proc/asound/card0/pcm0p/sub0/hw_params
/proc/asound/card0/pcm0p/sub0/info
/proc/asound/card0/pcm0p/info
/proc/asound/pcm
/proc/asound/timers
/proc/asound/modules
/proc/asound/cards
/proc/asound/devices
/proc/asound/version
/proc/asound/seq
/proc/asound/seq/oss
/proc/asound/seq/timer
/proc/asound/seq/clients
/proc/asound/seq/queues
/proc/asound/seq/drivers
/proc/asound/oss
/proc/asound/oss/sndstat
/proc/asound/oss/devices
# find /dev/snd
/dev/snd
/dev/snd/pcmC0D0c
/dev/snd/pcmC0D0p
/dev/snd/pcmC0D1c
/dev/snd/controlC0
/dev/snd/pcmC0D2p
/dev/snd/seq
/dev/snd/timer
I tried updating my configuration file /etc/alsa/cards/HDA-Intel.conf to
use device 2 instead of device 1 in the two places where it looked
appropriate. However, I've got no idea if that config file is even being
using for anything. Am I supposed to copy it on top of my alsa.conf ?
I'm quite clueless here.
A typical mplayer command lines I have tried:
mplayer -ac hwac3, -ao alsa:device=spdif VTS_08_4.VOB
mplayer -ac hwac3, -ao alsa:device=hw=0.2 VTS_08_4.VOB
In dmesg I see a mildly troubling message: hda_codec:
Unknown model for ALC880, trying auto-probe from BIOS...
I've managed to produce different sounds from the speaker, usually
crackling or buzzing, but not what I want to hear.
Can anyone help me? Or is alsa not quite ready to meet my needs yet?
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