Same problem here with my motherboard (Asrock 775 Dual-VSTA). As soon as I try to record or adjust the input level of the microphone, the device disappears from the sound applet. I have to log out from my session to get the sound back. I'm using Lucid 32bit and I had the same problem with Karmic (but not with Jaunty where my microphone worked just fine). Aside from the microphone problem, the sound output works just fine.
Same problem here with my motherboard (Asrock 775 Dual-VSTA). As soon as I try to record or adjust the input level of the microphone, the device disappears from the sound applet. I have to log out from my session to get the sound back. I'm using Lucid 32bit and I had the same problem with Karmic (but not with Jaunty where my microphone worked just fine). Aside from the microphone problem, the sound output works just fine.