rec works only after alsaconf

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Hi everybody! I hope I'm not asking a stupid question. I run debian
lenny amd64 (updated) and everything work fine, except for recording. If
I try to use gnome-sound-recorder or audacity, the applications can't
"hear" my voice (but I can hear it from speakers). If i run alsaconf it
seems not to change everything, but after this everything work
correctly, until I reboot, losing some changes. I've run alsa-info.sh
with system working correctly, then I rebooted and re-run the script.
This is the diff between the two logs (the first is when system is ok)

6c6
< !!Script ran on: Tue Dec 16 06:38:33 CET 2008
---
> !!Script ran on: Tue Dec 16 19:16:26 CET 2008
96,98c96
<     rates [0x560]: 44100 48000 96000 192000
<     bits [0xe]: 16 20 24
<     formats [0x1]: PCM
---
> N/A
142c140
<   Amp-In vals:  [0x23 0x23] [0x23 0x23] [0x23 0x23] [0x23 0x23] [0x23
0x23] [0x23 0x23] [0x23 0x23]
---
>   Amp-In vals:  [0x13 0x13] [0x13 0x13] [0x13 0x13] [0x13 0x13] [0x13 
0x13] [0x13 0x13] [0x13 0x13]
154c152
<   Amp-In vals:  [0x22 0x22] [0x22 0x22] [0x22 0x22] [0x22 0x22] [0x22
0x22] [0x22 0x22] [0x22 0x22]
---
>   Amp-In vals:  [0x12 0x12] [0x12 0x12] [0x12 0x12] [0x12 0x12] [0x12 
0x12] [0x12 0x12] [0x12 0x12]
166c164
<   Amp-In vals:  [0x22 0x22] [0x22 0x22] [0x22 0x22] [0x22 0x22] [0x22
0x22] [0x22 0x22] [0x22 0x22] [0x22 0x22] [0x22 0x22] [0x22 0x22]
---
>   Amp-In vals:  [0x12 0x12] [0x12 0x12] [0x12 0x12] [0x12 0x12] [0x12 
0x12] [0x12 0x12] [0x12 0x12] [0x12 0x12] [0x12 0x12] [0x12 0x12]
367,374c365,372
< crw-rw---- 1 root audio 116,  0 16 dic 01:21 /dev/snd/controlC0
< crw-rw---- 1 root audio 116, 24 16 dic 06:35 /dev/snd/pcmC0D0c
< crw-rw---- 1 root audio 116, 16 16 dic 01:21 /dev/snd/pcmC0D0p
< crw-rw---- 1 root audio 116, 25 16 dic 01:21 /dev/snd/pcmC0D1c
< crw-rw---- 1 root audio 116, 17 16 dic 01:21 /dev/snd/pcmC0D1p
< crw-rw---- 1 root audio 116, 26 16 dic 01:21 /dev/snd/pcmC0D2c
< crw-rw---- 1 root audio 116,  1 16 dic 01:21 /dev/snd/seq
< crw-rw---- 1 root audio 116, 33 16 dic 01:21 /dev/snd/timer
---
> crw-rw---- 1 root audio 116,  0 16 dic 19:14 /dev/snd/controlC0
> crw-rw---- 1 root audio 116, 24 16 dic 19:15 /dev/snd/pcmC0D0c
> crw-rw---- 1 root audio 116, 16 16 dic 19:14 /dev/snd/pcmC0D0p
> crw-rw---- 1 root audio 116, 25 16 dic 19:14 /dev/snd/pcmC0D1c
> crw-rw---- 1 root audio 116, 17 16 dic 19:14 /dev/snd/pcmC0D1p
> crw-rw---- 1 root audio 116, 26 16 dic 19:14 /dev/snd/pcmC0D2c
> crw-rw---- 1 root audio 116,  1 16 dic 19:14 /dev/snd/seq
> crw-rw---- 1 root audio 116, 33 16 dic 19:14 /dev/snd/timer
504,505c502,503
<   Front Left: Capture 35 [100%] [35.00dB] [on]
<   Front Right: Capture 35 [100%] [35.00dB] [on]
---
>   Front Left: Capture 19 [54%] [19.00dB] [on]
>   Front Right: Capture 19 [54%] [19.00dB] [on]
510,511c508,509
<   Front Left: Capture 34 [97%] [34.00dB] [on]
<   Front Right: Capture 34 [97%] [34.00dB] [on]
---
>   Front Left: Capture 18 [51%] [18.00dB] [on]
>   Front Right: Capture 18 [51%] [18.00dB] [on]
516,517c514,515
<   Front Left: Capture 34 [97%] [34.00dB] [on]
<   Front Right: Capture 34 [97%] [34.00dB] [on]
---
>   Front Left: Capture 18 [51%] [18.00dB] [on]
>   Front Right: Capture 18 [51%] [18.00dB] [on]
522,523c520,521
<   Front Left: Capture 120 [100%] [30.00dB]
<   Front Right: Capture 120 [100%] [30.00dB]
---
>   Front Left: Capture 58 [48%] [-1.00dB]
>   Front Right: Capture 58 [48%] [-1.00dB]
746,747c744,745
<         value.0 35
<         value.1 35
---
>         value.0 19
>         value.1 19
768,769c766,767
<         value.0 34
<         value.1 34
---
>         value.0 18
>         value.1 18
791,792c789,790
<         value.0 34
<         value.1 34
---
>         value.0 18
>         value.1 18
940,941c938,939
<         value.0 120
<         value.1 120
---
>         value.0 58
>         value.1 58
951,958d948
< snd_hda_intel
< snd_pcm
< snd_seq
< snd_timer
< snd_seq_device
< snd
< soundcore
< snd_page_alloc
983a974
> snd_hda_intel
984a976,982
> snd_pcm
> snd_seq
> snd_timer
> snd_seq_device
> snd
> soundcore
> snd_page_alloc


thank you for attention, Bruno.

P.S.

When I try to run gnome-sound-recorder whithout having run alsaconf, it
crashes on exit. If then I try the acquisition test in
system-->preferences-->audio i get "Pipeline construction failed, try
<<gconfaudiosrc ! audioconvert ! audioresample ! gconfaudiosink
profile=chat>>

another big thank you, Bruno.

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