[SOLVED] No sound with Flash Player in Firefox after adding NVIDIA GT 220 graphics card
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# A hint is required for listing the device in some GUIs, e.g. Phonon configuration.
description "My dmix dsp0"
# mixer0 can stay unchanged, because
# it isn't used anyway, I guess ;)
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Just to add another success story. I had the same problem as OP - both flash plugin and the "play" command failed to produce any sound whereas all other apps (media players, other non-flash streams) seemed to work fine.
In my case this was not caused by an new multimedia card, but upgrades to firefox or the flash plugin - not sure which caused the problem, but almost certainly one of these.
Creating the ~/.asoundrc as suggested by EternalNewbie fixed the problems.
ALSA lib pcm_dmix.c:1018snd_pcm_dmix_open) unable to open slave
The fact that this was made at any occurrence the sound card had to be reached, there was no sound at all, that is, until i forced alsa to restart with:
# alsa force-reload
I've tried everything from purging alsa to adding ~/.asoundrc with different parameters until finally found what was causing trouble.
What i did is i went through the installed pkg-list and looked at the description and i found that roaraudio made changes to my settings. So after purging it, alsa was reborn.
Thought i'd share it here in case somebody's still having problem after reading all above. I found pretty good clues here on where to look and figured what measures to take.