Modem(PCMCIA) works on 4.8, hangs machine on 5.2-BETA

[M. Warner Losh]

In message: <20031125185456.C335 at lerlaptop.lerctr.org>
            Larry Rosenman <ler at lerctr.org> writes:
: sio2 at port 0x2f8-0x2ff irq 11 flags 0x40000 slot 0 on pccard0
: sio2: type 16550A
: sio2: unable to activate interrupt in fast mode - using normal mode
: The SIO2 is my Toshiba 3CXM056-BNW modem, and is what I'm sending this
: from on 4.8.
: 
: What debug/help do y'all need to fix it?

Hmm, sounds like an interrupt storm.

What kind of pccard bridge do you have?

Warner