This may be related to bug #730628. Since kernel 2.4.20
the airo driver (I have a 350 card) seems unable to
handle transfers bigger than 35 kbaud. If the transfer
is bigger, the keyboard stops working (interrupt
problem?) and the card stops working as well (red light
is on, green one is off).
since kernel 2.4.21 the airo driver completely stopped
working (red light constantly on). On unloading the
module airo and airo_cs the keyboard problem reoccurs.
Please contact me for further info.