IBM Thinkpad 600X, Serial I/O, audio and FC4

[Jeffrey Ross]

I am having problems with FC4 using the built in serial port (a USB to 
Serial adapter works fine and shows up as /dev/ttyUSB0) which I believe 
should be /dev/ttyS0 (I've tried ttyS1 also), when using "cu" the 
program responds with "connected" then waits about 15 seconds and 
responds back with "Disconnected".  If I use kermit, it responds 
"/dev/ttyS0 is not a terminal device"

The second issue I'm having is with the audio, it doesn't work. lspci -v 
reports the sound card as:

00:06.0 Multimedia audio controller: Cirrus Logic CS 4614/22/24 
[CrystalClear SoundFusion Audio Accelerator] (rev 01)
        Subsystem: IBM: Unknown device 0153
        Flags: bus master, slow devsel, latency 64, IRQ 11
        Memory at 50100000 (32-bit, non-prefetchable) [size=4K]
        Memory at 50000000 (32-bit, non-prefetchable) [size=1M]
        Capabilities: [40] Power Management version 2


as an FYI both the serial port and the sound worked under FC3.

TIA
Jeff