Re: Minicom lag problem

[Michael Jinks <michael twopoint com>]

Michael Robinet wrote:
> 
> I am running Minicom-1.81-4 rpm that came with RedHat 5.1
> I just installed it and have never had it working.
> I tried running "cu -l /dev/cua2 -s 115400", but it gave me a bash:cu
> command not found.

This can be fixed by installing the uucp rpm (also from your RH cd).  I
recommend this as a debugging step because cu is a lot more lightweight
than Minicom, although from the other stuff in your message I'm starting
to think that cu will also have long delays.


> I run Win98 also and I've never had an IRQ conflict with it.

No long delays either, I assume?  Hmm. . . 

> I also noticed something else interesting.  If I type in my username and
> password 15-20 seconds before the username and password prompts appear I can
> log on.  The when I logout to disconnect the connection status indicator in
> the lower right corner changes from Connected to Disconnected almost
> immediately, but "logout" and "NO CARRIER" don't appear on the screen for
> another 15-20 seconds.  All of the ALT menus such as ALT-Z appear right away
> and I don't have any problem there.

Interesting is right.  It looks like everything is fine up until the
serial port tries to send actual character information to the
controlling process, and that's what hangs.  Only a guess.

> I noticed that when I run "stty -a < /dev/ttyS2" it lists "speed 9600 baud"
> which seems really slow.

Yeah, especially since you have a real 16550A UART (the chip that
controls the serial port), which _should_ be capable of speeds well
beyond 9600.  Have you tried "stty speed 115200 >/dev/ttyS2"?

>  I don't really know what that speed is for, so I
> didn't look into trying to change it.

How old is this machine?  Could it be that you just have slow serial
ports?  (My guess is not; you said that you don't have trouble under
Win98, but I don't think you mentioned any connection speeds.)

Well, that's my latest round of wild guesses.  I'm having a serial
debugging day myself, so if nothing else this is giving me ideas for
stuff to try on my own recalcitrant box.

-- 
Michael Jinks
mailto:michael twopoint com http://www.twopoint.com
Systems Administrator, Two Point Conversions, Inc.

"Never interfere in a boy and girl fight." -- W. S. Burroughs