Ubuntu
gnome-alsamixer package

  1. Bug #448180
  2. Comment #7

Comment 7 for bug 448180

Revision history for this message
Raymond (superquad-vortex2) wrote :

when there is no sound card detected by pulseaudio server and PA server load "Dummy Output" module

aplay -l
aplay : device_list :235 no soundcards found...

application can still use the "pcm" device of pulse with "Dummy Output" module but "ctl" device of pulse seem disappear

alsamixer
cannot open mixer : no such file or directory

gnome-alsamixer
(gnome-alsamixer:1335) GLib-Object-CRITICAL **: gtype_instance_get_private : assertion failure ' Instance != NULL && instance->g_class != NULL' failed

The above situation can be reproduced by virutalbox with sb16 in Maverick , since the "virtual sb16" cannot be autoloaded because of isapnp , the PA server cannot detect any sound card and use "Dummy Output"

after manual load by "sudo modprobe snd-sb16 isapnp=0"

alsamixer and gnome-alsamixer work fine after restart of PA server by logout/login

This mean that PA should also provide ctl.pulse for those mixer application such as gnome-alsamixer when there is no sound card detected