[PD] Linux - USB-Audio takes over the sound card slot "0"

Ingo ingo at miamiwave.com
Sun Nov 3 05:38:26 CET 2019

When I store /etc/modprobe.d/alsa-base.conf in [DOS-Format] (with nano) it 
doesn't work at all.
Alsamixer does not even open. So I have to store in [MAC-Format] with nano. 
This seems to be readable but does unfortunately not work.

After rebooting I got 4 MIDI interfaces from soundcard number 0-3 and the 
actual soundcard shows up a number 4.
Which means no sound! Very annoying ...


Hi there,

I have a problem where a USB audio device sometimes uses the soundcard slot 0 
when connected during startup.
This happens only from time to time with no obvious indication why it boots up 

I have set up /etc/modprobe.d/alsa-base.conf like this:


#autoloader aliases
install sound-slot-0 /sbin/modprobe snd-card-0 install sound-slot-1 
/sbin/modprobe snd-card-1 install sound-slot-2 /sbin/modprobe snd-card-2 
install sound-slot-3 /sbin/modprobe snd-card-3 install sound-slot-4 
/sbin/modprobe snd-card-4 install sound-slot-5 /sbin/modprobe snd-card-5 
install sound-slot-6 /sbin/modprobe snd-card-6 install sound-slot-7 
/sbin/modprobe snd-card-7

# Cause optional modules to be loaded above generic modules install snd 
/sbin/modprobe --ignore-install snd $CMDLINE_OPTS && { 
/sbinmodprobe --quiet --use-blacklist snd-ioctl132 ; 
/sbin/modprobe --quiet --use-blacklist snd-seq ; } # Workaround at bug #499695 
(reverted in Ubuntu see LP #319505) install snd-pcm /sbin/modprobe --  
ignore-install snd-pcm $CMDLINE_OPTS && { 
/sbin/modprobe --quiet --use-blacklist snd-pcm-oss ; : ; } install snd-mixer 
/sbin/modprobe -- ignore-install snd-pcm $CMDLINE_OPTS && { 
/sbin/modprobe --quiet --use-blacklist snd-mixer-oss ; : ; } install snd-seq 
/sbin/modprobe -- ignore-install snd-pcm $CMDLINE_OPTS && { 
/sbin/modprobe --quiet --use-blacklist snd-seq-midi ; 
/sbin/modprobe --quiet --use-blacklist snd-mixer-seq ; : ; } # install 
snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi $CMDLINE_OPTS && { 
/sbin/modprobe --quiet --use-blacklist snd-seq-midi ; : ; } # Cause optional 
modules to be loaded above sound card driver modules install snd-emu10k1 
/sbin/mod .....
# Prevent abnormal drivers from grabbing index 0 options bt87x indes -2 
options cx88_alsa index ......
# Keep snd-usb-audio from being loaded as first sound card options 
snd-usb-audio index=-2

alias snd-card-0 snd-hda-intel
alias snd-card-1 snd_hda_codec_atihdmi
alias snd-card-2 snd-usb-audio
alias snd-card-3 snd-usb-audio
alias snd-card-4 snd-usb-audio
alias snd-card-5 snd-usb-audio
alias snd-card-6 snd-usb-audio
alias snd-card-7 snd-usb-audio

options snd-hda-intel model=6stack-digout options snd-hda-intel index=0 
options snd_hda_codec_atihdmi index=1

options snd-usb-audio index=2,3,4,5 id=midi1,midi2,midi3,midi4


Does anybody have an idea why the USB keyboard still takes over the sound card 
slot 0 and keeps the sound-card from showing up?
I just took a look at /sbin/. "modprobe" links to /bin/kmod.
Are there any other setup files for the sound cards other than 

When I edit and store alsa-base.conf in the console it tells me [MAC-Format] 
by default.
Should this be set to [DOS-Format] in order to be readable?

Any help or ideas are appreciated!


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