[arch-general] Why does my sound work sometimes & not others?

[David C. Rankin, J.D.,P.E.]

On Wednesday 13 May 2009 09:40:34 David Rosenstrauch wrote:
>
> snd-hda-intel encompasses many different chipsets/codecs.  Which one
> does your card use?  You can find out like so:
>
> [darose at daroselin ~]$ grep Codec /proc/asound/card0/codec#0
> Codec: IDT 92HD71B7X
>
>
> As far as general things to check/try:
>
> * Try restarting the KDE sound system.
>
> * Try checking to see if anything got muted in the mixer (i.e., check in
> Kmix or alsamixer).
>
> * Try seeing if this is a KDE issue or not by hitting ctrl-alt-F1,
> logging into a non-X console, and testing the sound using alsaplayer.
>
> * I had a problem with my sound card whereby "analog loopback" was
> getting set and muting the sound.  (See:
> http://bbs.archlinux.org/viewtopic.php?pid=535521#p535521)  Tore my hair
> out over that one for a LONG time.  Maybe this is your issue too?
>
> HTH,
>
> DR

Hmm,

	Another DR message that gets flagged as "Important" in the email list. Thanks 
DR. Here is where I am at. So far, sound has been good for the past 3 hours. 
(I haven't had to login/logout yet though). From Damjan's suggestion, here is 
my working open file list:


Working Setup:

[13:46 alchemy:/home/david] # lsof /dev/snd/*
COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
kmix    3263 david   10u   CHR 116,10      0t0 4088 /dev/snd/controlC0

[13:48 alchemy:/home/david] # lsof /dev/dsp*

+---------

	Now, I preface this with the fact that I have virtually no experience picking 
through the sound system in /proc, but it looks like I have "2"? codecs 
required (HDA Codecc 0 & 3). Here is what looked relevant to the discussion:

[13:48 alchemy:/home/david] # grep Codec /proc/asound/card0/codec#0
Codec: LSI ID 1040

[14:00 alchemy:/home/david] # grep Codec /proc/asound/card0/codec#3
Codec: Realtek ALC268

[14:01 alchemy:/home/david] # cat /proc/asound/card0/id
SB

[14:04 alchemy:/home/david] # cat /proc/asound/cards 
 0 [SB             ]: HDA-Intel - HDA ATI SB
                      HDA ATI SB at 0xf8700000 irq 16

[14:05 alchemy:/home/david] # cat /proc/asound/hwdep 
00-03: HDA Codec 3
00-00: HDA Codec 0

[14:07 alchemy:/home/david] # cat /proc/asound/pcm 
00-00: ALC268 Analog : ALC268 Analog : playback 1 : capture 1
00-01: ALC268 Digital : ALC268 Digital : playback 1
00-02: ALC268 Analog : ALC268 Analog : capture 1

[14:07 alchemy:/home/david] # cat /proc/asound/version 
Advanced Linux Sound Architecture Driver Version 1.0.18a.

	Now since this mostly Greek concerning the LSI ID and where the Realtek codec 
resides, I'll just have to put it to the list: "Does this look normal?" 
Anything I seem to be missing? Like I said, right now the sound is working, 
so I'll just compare the values/parameters to what I get when it quits again. 
Thanks again for your help.

-- 
David C. Rankin, J.D.,P.E.
Rankin Law Firm, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
Telephone: (936) 715-9333
Facsimile: (936) 715-9339
www.rankinlawfirm.com