[Alsa-user] spdif on AOpen EA65-II-barebone (ALC650F)

[Dirk g. O. <tu...@gm...>]

Hello,

is someone around having experiences which spdif-out on ALC650F-chips?
Here is the output of
$cat /proc/asound/card0/codec97#0/ac97#0-0

> 0-0/0: Realtek ALC650F
>
> Capabilities     :
> DAC resolution   : 20-bit
> ADC resolution   : 18-bit
> 3D enhancement   : Realtek 3D Stereo Enhancement
>
> Current setup
> Mic gain         : +0dB [+0dB]
> POP path         : pre 3D
> Sim. stereo      : off
> 3D enhancement   : off
> Loudness         : off
> Mono output      : MIX
> Mic select       : Mic1
> ADC/DAC loopback : off
> Double rate slots: 10/11
> Extended ID      : codec=0 rev=1 LDAC SDAC CDAC DSA=0 SPDIF DRA VRA
> Extended status  : LDAC SDAC CDAC SPDIF=10/11 SPDIF VRA
> PCM front DAC    : 44100Hz
> PCM Surr DAC     : 44100Hz
> PCM LFE DAC      : 44100Hz
> PCM ADC          : 48000Hz
> SPDIF Control    : Consumer PCM Category=0x2 Generation=1 Rate=44.1kHz
> SPDIF In Status  : Not Locked

and here the output of
$aplay -l

> **** List of PLAYBACK Hardware Devices ****
> card 0: ICH5 [Intel ICH5], device 0: Intel ICH [Intel ICH5]
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> card 0: ICH5 [Intel ICH5], device 4: Intel ICH - IEC958 [Intel ICH5 -
> IEC958]
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0

So I thought the following /etc/asound.conf would be ok (just the
important parts):

> pcm.!default {
>   type plug
>   slave.pcm "digital-hw"
> }
> ...
> pcm.digital-hw {
>  type hw
>  card 0
>  device 4
> }
> ...
> pcm.dmix-analog {
>  type dmix
>  ipc_key 1234
>  slave {
>    pcm "analog-hw"
>    period_time 0
>    period_size 1024
>    buffer_size 4096
>    rate 44100
>  }
> }

So I think there should be something wrong with buffer sizes or else,
but I don't get any bit forward. Output via analog-jack works like a
charm, just the spdif - coax as well as optical - stay quiet (besides:
IEC958 is acitvated in alsamixer).
I would really appreciate if someone would lend me a hand on this. I
already spend the evenings of the last three weeks on that and it's
driving me mad.

Cheers,
Dirk.