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Neskweek
n00b
Joined: 20 Jun 2004
Posts: 35
Location: Nantes - France
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 Posted: Thu Nov 18, 2004 1:28 pm Post subject: Alsa & snd-usb-audio very strange behaviour |
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Hi Everybody 
It's been a while that I've got some problem making alsa recognise my usb audio interfaces and that on two machines. I managed to find something but I don't find that solution elegant. So Iwas hoping somebody could help.
Here is the thing :
First I let you throw an eye on my /etc/modules.d/alsa :
| Code: |
# Alsa 0.9.X kernel modules' configuration file.
# $Header: /home/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsa-modules.conf-rc,v 1.1 2003/08/05 21:07:55 johnm Exp $
# ALSA portion
alias char-major-116 snd-intel8x0 // On the other machine it's an snd-cs46xx
alias char-major-116 snd-usb-audio
# OSS/Free portion
alias char-major-14 soundcore
##
## IMPORTANT:
## You need to customise this section for your specific sound card(s)
## and then run `update-modules' command.
## Read alsa-driver's INSTALL file in /usr/share/doc for more info.
##
## ALSA portion
alias snd-card-0 snd-intel8x0
alias snd-card-1 snd-usb-audio
## alias snd-card-1 snd-ens1371
## OSS/Free portion
alias sound-slot-0 snd-card-0
alias sound-slot-1 snd-card-1
## alias sound-slot-1 snd-card-1
##
# OSS/Free portion - card #1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
## OSS/Free portion - card #2
alias sound-service-1-0 snd-mixer-oss
alias sound-service-1-3 snd-pcm-oss
alias sound-service-1-12 snd-pcm-oss
alias /dev/mixer snd-mixer-oss
alias /dev/dsp snd-pcm-oss
alias /dev/midi snd-seq-oss
# Set this to the correct number of cards.
options snd_cards_limit=2
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Ok now, regarding the kernel config it didn't change a thing:
I tried to modularise my config or to integrate all alsa things it do the same (I didn(t forget to add the USB audio module in the USB section)... Here are the symptoms :
I boot the machine, alsasound start but it only found the soundcard (damn!). Curiously the snd-usb-audio module and the other one are loaded (if modularized of course).
Trying to make some "alsamixer -c 1[or 2]" (got a webcam with integrated microphone and a usb micro device) nothing....
So to Resume got the modules loaded but none of the usb devices are active.... strange.....
Now this is my best part :
After lots of nervous try that work (YES!  ) SO I reboot, happily to make sure that work directly..... and BLAM !  that don't ....
I understood after an hour.
When you boot it does exactly what I described then you restart alsa (after hotplug and before xdm) and all work. But where it is tricky is that you must restart it  : To make it work correctly I had to add that line to the xdm init script just after "start() {" :
/etc/init.d/alsasound restart"
Now it work correctly: it find all my audio devices........
But it still weired since before I had to reinstall my principal box it didn't do that.
If somebody is inspired just let me know, thanks.  |
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gentsquash
l33t
Joined: 03 Nov 2004
Posts: 753
Location: Still a Gentoo beginner.
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| Posted: Mon Nov 22, 2004 3:39 am Post subject: |
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Permit, please, a naive question: Do you have a symlink
| Code: | alsasound -> /etc/init.d/alsasound
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in "/etc/runlevels/boot"; or is it
in "/etc/runlevels/default/"?
=====
Also, is this query
https://forums.gentoo.org/viewtopic.php?t=254802&highlight=
relevant to yours?
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Prof. Jonathan LF King, Mathematics dept., University of Florida |
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