Maybe a bad PCMCIA driver version
PCMCIA Multifunction Card Issues
Problem with Xircom Cardbus 10/100 + Modem 56 (HelmutS)
Date: 2000, Feb 28
From: David Hinds <firstname.lastname@example.org>
My first suggestion would be a PCMCIA driver upgrade. Some bugs in
CardBus resource management have been fixed since 3.1.3 came out.
The card can only use one interrupt.
to: "Maybe a bad PCMCIA driver version"