If you intend to use both the sound chipset and a PCMCIA card in this laptop, in order to avoid conflicts at input/output ports level, you'll have to modify the file /etc/pcmcia/config.opts to change the line 6 to

include port 0x300-0x4ff, port 0x1000-0x17ff

The NSC PC87108/338 chipset controlling IrDA on this model is supported by the 2.4.16 kernel. (Source : http://www.bits.bris.ac.uk/madmatt/laptop.shtml)

Some users had to apply the same tric for their Omnibook 4150 with success.