I don't know exactly what caused the problm, but I think it was around the time when I installed Firefox 3.5 for the first time. I lost the sound in Firefox and did a alsa force-reload and I think it was after that the problem started. But I've done so much configuring and reinstalling since then, so I really don't know what's causing the problem.
I'm using ALSA. The problem is: When I listen to music in Songbird I can't hear any music in gnome mplayer or firefox. When I close Songbird and restarts gnome mplayer and firefox I can hear sound both places, at the same time. When I then start Songbird again, the sound from mplayer and firefox stops and I can only hear sound from Songbird.
This is when all options under “Control Center → Sound” is configured to use “HDA Nvidia LAC883 Dgital (ALSA)”. When I change all the options to “autodetect” I can hear sound in both Firefox and gnome mplayer, but no sound in Songbird.
I've tried a lot of packages from synaptic, not really knowing what I was doing. Here's a list with packages I have installed:
aconnectgui (ALSA MIDI connection utility)
alsa-oss (alsa wrapper for OSS apps)
alsaplayer-alsa (PCM player for alsa)
alsa-utils (command line utilities)
asoundconf-gtk (choose default alsa sound card)
gnome-alsamixer (GUI alsa mixer for Gnome)
gstreamer0.10-alsa (gstreamer plugin)
xmms2-plugin-alsa (xmms2 plugin)
libasound2 (alsa libs and plugins)
libasound2-plugins (jack, OSS, pulseaudio plugins for libasound2)
libesd-alsa0 Enlightened Sound Demon (allows multiple audio streams on one device, not really necessary)
All I know is that this used to work. After a fresh install I could play sound with any application I wanted, all at the same time.
If I could run some recovery or something to get all sound-settings back the way they were after the installation it would be perfect.
Any suggestions how to solve the problem?