Auto-detected and uses the snd-hda-intel driver. The Fujitsu has a microphone attached to this sound card, but it does not seem to be auto-detected. A microphone attached to the microphone jack works well with the default kernel.
The microphone works with the following settings in alsamixer (or KMix)...
Input -- (Optional) InMux turned on, and set to at least 1/4 -- this is the equivalent of microphone boost, I think. (Optional) InVol turned on, and set high.
Switches -- (Optional) Mic as Output turned off. ADCMux turned on.