I think what afreitascs is trying to say is that, if you start Firefox from an xterm or KDE Konsole, you might see some error messages that point to where the problem is.

I would check if some process is already using libasound:

Okay, good idea... no error messages, though. And yes, I've killed all the processes that were using sound, no luck... this is nuts.

'm Sorry
I inadvertently wrote Konsole in my language ...

I'm running out of ideas. Flash sound in Firefox doesn't work at all. In Konqueror it's lottery; sometimes it works and sometimes it doesn't. This is maddening.

Okay, check this out... I uninstalled both flasplayer-plugin and libflashsupport, then re-installed them. So check this out: flash sound now works great in Firefox, but not at all in Konqueror! Any ideas?

Umm, what's that? Some broken library to fix some other broken audio library that is required by a third party broken desktop?

Seriously though, are you attempting to use Pulse Audio and Gnome?

libflashsupport is available through slackbuilds.org and reputed to help solve no sound problems in flash. Anyway, it doesn't seem to matter... I now have no sound in either firefox or konqueror. This is ridiculous. I've never had this much trouble with a new hardware device before...

libflashsupport is a very poor substitute and is never necessary IMO...are you actually using Gnome and/or pulseaudio? Flash attempts to output to the first audio device through ALSA. Assuming nothing is locking up your sound device (by using OSS compatibility, for example) Flash should output to ALSA by default. You can try switching your sound device to the first slot and see if that makes a difference (see here for information on how to do that). This theoretically should work through .asoundrc as well so I'm not sure why it isn't. I'm not sure if the spaces between . and ! in your lines make a difference but for the record I have always used pcm.!default and ctl.!default.

I'd rather eat my own buns than use Gnome or Pulseaudio. I'll uninstall libflashsupport and see what happens.

That article you linked to looks like what I'm looking for but there's one problem... I don't have a /etc/modprobe.d/alsa.conf file. I have a /usr/share/alsa/alsa.conf, but ti doesn't look much like what's described in that article. I'll try editing the .asoundrc file, but I'd really rather set up a global solution.

Uninstalling libflashsupport and making those modifications to my .asoundrc file got everything working! I'd still like to get the alsa configuration configured globally if anyone can provide any guidance. Thanks!

Did you run alsaconf as root after you installed the new card?

---edit---
Add the .conf to the file alsaconf produces in /etc/modprobe.d/ or else you'll get a warning on reboot. This has been fixed in -current with an update to alsa-utils.

Yeah; I've run alsaconf several times, actually. I'll run it again and let you know if it gives me a file.

Okay, I just ran it again. The file it messes with is /etc/modprobe.d/sound, and when it's finished the contents of that file are:

Earlier in this thread you wrote The card I want to use IS card 1 and your .asoundrc is pointing to card 1, but you chose card-0 in alsa-conf.

Double check everything matches. You may not even need a .asoundrc. http://alsa.opensrc.org/.asoundrc