[ubuntu] How do I restore missing asound files used in ALSA for 12.04

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http://ubuntuforums.org – I use ALSA not pulse. I had it working the way I want and then started computer after an update and every time I try to play a video there is a report that the drivers are missing. This is an example: Audio output failed: The audio device "sysdefault:CARD=Intel" could not be used: No such device. Previously cat /proc/asound/modules showed three cards now it shows nothing. These are the cards that seem to have lost all their content: pcm ----no soundcards---- modules ---empty hwdep ---empty cards ---no soundcards ---- Without doing a system re-install is ther (Hardware)