pcmcia/pppd problem in potato

[Graham Williams <Graham.Williams@cmis.csiro.au>]

To recap: I'm somewhere along the way of moving from slink to potato.
After recompiling the kernel and pcmcia modules "pon" stopped working
with the log indicating from pppd:

      Can't get terminal parameters: Input/output error

Doing a

      setserial /dev/ttyS1 irq 0

sometimes fixes this, but turning polling off reduces the throughput
dramatically. Sometimes doing:

      setserial /dev/ttyS1 irq 3

fixes things up again (the 3 came from hunting through the messages
log and guessing the association between irq 3 and pcmcia).  Sometimes
I need to reboot to get these setserial commands to have an effect
(i.e., to get "pon" working again).

I'm getting by, but I'd sure like to understand what's going on, and
fix it?

Cheers,
Graham

>>>>> Dan Christensen wrote to Graham Williams on 30 Nov 1999 02:57:31 +1100:

    Dan> ...  One thing that makes my modem work again is to type:
    Dan>   setserial /dev/ttyS1 irq 0
    Dan> ...