[pulseaudio-discuss] [SOLVED] Re: No sound output after upgrade

[David Björkevik]

On 2010-01-14 00:30, Lennart Poettering wrote:
> On Sun, 10.01.10 23:34, David Björkevik (david at bjorkevik.se) wrote:
>
>> I know. Although I don't think that the mixer settings are the problem
>> because I tried tweaking every single one of them without getting any
>> audio out. Also, after a "killall pulseaudio", mplayer happily plays
>> sound through the card.
>
> That might be because PA enables a path that makes no sense on your
> card.

Probably. Adding "control=" fixed the problem and sound is back on.

>
> Please do the following:
>
> run mplayer so that it properly produces audio and bypasses PA. Then
> do an "amixer -c0>  a". Then, run PA and run mplayer on top of it and
> verify with pavucontrol that you are playing audio on the right device
> and make sure that PA at least "thinks" it plays something. Then,
> do an "amixer -c0>  b".
>
> Finally, do a "diff -u a b -C 7" and paste that here.

diff: conflicting output style options

Here's "diff -U 5 a b"

--- a	2010-01-24 20:53:23.288259727 +0100
+++ b	2010-01-24 20:53:15.762260385 +0100
@@ -147,20 +147,20 @@
  Simple mixer control 'Multi Track Peak',0
    Capabilities: volume penum
    Playback channels: Front Left - Front Right - Rear Left - Rear Right 
- Front Center - Woofer - Side Left - Side Right - Rear Center - ? - ? - 
? - ? - ? - ? - ? - ? - ? - ? - ? - ? - ?
    Capture channels: Front Left - Front Right - Rear Left - Rear Right 
- Front Center - Woofer - Side Left - Side Right - Rear Center - ? - ? - 
? - ? - ? - ? - ? - ? - ? - ? - ? - ? - ?
    Limits: 0 - 255
-  Front Left: 39 [15%]
-  Front Right: 28 [11%]
+  Front Left: 0 [0%]
+  Front Right: 0 [0%]
    Rear Left: 0 [0%]
    Rear Right: 0 [0%]
    Front Center: 0 [0%]
    Woofer: 0 [0%]
    Side Left: 0 [0%]
    Side Right: 0 [0%]
-  Rear Center: 142 [56%]
-  ?: 152 [60%]
+  Rear Center: 119 [47%]
+  ?: 110 [43%]
    ?: 0 [0%]
    ?: 0 [0%]
    ?: 0 [0%]
    ?: 0 [0%]
    ?: 0 [0%]

Apparently, PulseAudio mutes the "Multi Track Peak" control. I did not 
catch this earlier, since that channel appear "frozen" in the alsamixer UI.

Anyhow, the problem appears fixed for me now, but if I can provide more 
info that will help others with the same card, please tell me how.

Regards,
David