Internal sound card suddenly not recognized (laptop and desktop)

Both systems run Arch.
A week or so ago, my laptop decided to forget that it had an internal sound card... the bluetooth headset and usb sound card still seem to work just fine... but the built in card has disappeared from the system completely.  This morning, I was listening to shoutcast on my desktop when I left the room... I come back to complete silence and vlc (which had been playin shoutcast) was no longer running.  So, I started to play some local music via Rhythmbox... no sound... I open my mixer, the internal sound card is gone!  The only instance I can seem to find it is if I run Alsamixer via the commandline (have not tested this on the laptop yet, was planning to troubleshoot that before the end of the week).  What information do you guys need to help me figure out why my soundcards have suddently gained amnesia?  again, ALL external cards on both systems work just fine (listening to shoutcast on a USB sound card at this very moment on the desktop)...

The card is still not readable directly on the computer? Can you write to the card and read from it with the computer? What about with another device?
You need to determine if the problem is the BlackBerry or the card. If you can read the card or write to it with another device, that suggests the card. You should also try a known good card in the BlackBerry.
If the card is the problem, you could try repairing and recovering files with the computer first, and then format the card and test. If the problem continues or returns, get a new card.

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