[techtalk] modem problems

[Kathryn Hargreaves]

Hi, I'm having trouble getting an internal modem to work.
It's on ttyS1 and when I connect to it with minicom, it sits
there for half a minute or so, then echoes the init string back
in bursts of maybe 16 chars (it looks like about 16 but I didn't
count to be exact).  I can type commands like ATDT2345... and
they get processed and echo back a long while (several seconds)
later.  Needless to say, using the modem for ppp (the intended use)
is pretty much hopeless.

Any idea what might be going on?  I suspect the kernel is somehow
not receiving the ttyS1 interrupts (irq 3) but is somehow noticing
much later that chars are available there.  But that's just a wild
guess.  The kernel does seem to detect ttyS1 normally in the boot
messages.