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Old 05-25-2008, 06:57 PM   #1
S. Shuck
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Registered: May 2008
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alsaconf vs. /proc data (USB audio)


This is my first post, so I'll start by saying WOW and THANKS for the great job by everyone on this site.

I've been a Mac person for the longest time, until trying Ubuntu on my MacBook and deciding to sell it for a $250 modern desktop with Linux. (Made $500.) Started with Slackware 12.0 running KDE and "moved up" to XFCE when I upgraded to 12.1....At this rate I'll be running strictly command-line *BSD in a year.

alsaconf seems to contradict /proc data. Seems paradoxical, but when I run alsamixer and hit '/' I can plainly see my Logitech V20 USB speakers identified as sound card 1, after on-board Intel as 0, but alsaconf can't find it after 5 seconds of looking. Furthermore, I can use alsamixer -c 1 to adjust the USB audio settings, but I don't get sound half of the time. For example, I can hear sound now and 3 reboots ago but not the last 2 reboots. (No changes had been made.)

The reason I'm posting this under the Slackware subforum is because this is happening after a fresh reformat and install. Seems like a pretty scientific case.

Is it an ALSA bug?

Last edited by S. Shuck; 05-25-2008 at 07:00 PM.
 
Old 05-26-2008, 12:35 PM   #2
S. Shuck
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And now I can't hear sound.
 
Old 05-28-2008, 03:04 AM   #3
S. Shuck
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Can someone please give me a clue, at least how to continue to research the problem? What are some of the variables which might influence alsaconf's behavior?
 
Old 05-29-2008, 04:01 AM   #4
samac
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Registered: Mar 2004
Location: Kirkwall, Orkney
Distribution: Linux Mint 20.3 - Cinnamon
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Hi

WELCOME to Slackware, sorry for the delay :-)

Do you just use your USB speakers? If so you could try to disable the on-board sound card in the bios.

Another option would be to blacklist the sound module for your on-board sound card in
Code:
/etc/modprobe.d/blacklist
You can check whether or not snd-usb-audio module has been loaded using
Code:
/bin/lsmod
, and if it hasn't try
Code:
modprobe snd-usb-audio
, if that works add that command to the bottom of
Code:
/etc/rc.d/rc.modules
There is probably also a way to do this with udev as well, but I don't like udev so I have never bothered to learn anything about it.

Hope that this prompts some further input.

samac
 
Old 06-17-2008, 04:39 PM   #5
S. Shuck
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Registered: May 2008
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Thanks for the help and sorry for the delay.

I disabled onboard sound in my motherboard's BIOS (BIOSTAR 945G) and it does fix the problem. Makes me wonder if it's a problem with my onboard audio drivers.

It's a temporary fix only, though, because I'd like to be able to plug in headphones, of course using onboard audio, and have that action automatically switch the sound card in ALSA. Might require scripting....Anyway, one thing at a time.
 
  


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