At Mon, 02 Apr 2007 13:41:21 +0200, Andreas Happe wrote:
On Mon, 2007-04-02 at 13:27 +0200, Takashi Iwai wrote:
Still wondering why setting AC97-SPSA to 0 doesn't work in this case. Try the following:
- plug to the analog output on docking station
- set "IEC958 Playback AC97-SPSA" to zero via alsamixer or whatever
- set "IEC958 Playback Switch" on
- run % aplay -Ddefault foo.wav
| aplay -Ddefault shutdown.wav Playing WAVE 'shutdown.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
-> Silence
| aplay -Dspdif startup.wav aplay: main:550: audio open error: Device or resource busy
-> I got the totem player open in the background, it didn't produce any sounds but seems to lock the pcm channel.
After closing totem player:
| arcs@storm:/usr/share/sounds$ aplay -Dspdif startup.wav Playing WAVE 'startup.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
-> played sound
| aplay -Ddefault startup.wav Playing WAVE 'startup.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
-> still no sound
hoped that helped.
Make sure that AC97-SPSA is reset to zero before you play via default PCM.
Also, you can compare ac97 regsiters by dumping the proc file /proc/asound/card0/codec97#0/*-0+regs file between playing "spdif" and "default" PCMs. Then you can see at least whether any ac97 register is changed.
Takashi