[97101] in RedHat Linux List
Minicom lag problem
daemon@ATHENA.MIT.EDU (Michael Robinet)
Sat Oct 31 19:08:08 1998
From: "Michael Robinet" <michael.robinet@mankato.msus.edu>
To: <redhat-list@redhat.com>
Date: Sat, 31 Oct 1998 18:07:17 -0600
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com
I installed the uucp rpm and tried to run "cu -l /dev/ttyS2 -s 115200", but
it came up with:
cu: open (/dev/ttyS2): Permission Denied
cu: /dev/ttyS2: Line in use
I tried to run "stty speed 115200 > /dev/ttyS2", but that gave me an error.
So I tried "stty ispeed 115200 > /dev/ttyS2" and "stty ospeed 115200 >
/dev/ttyS2", but i still have the same problem and it still reads 9600 baud
for speed. My computer is an IBM Aptiva S97 Pentium 200 MMX and is only
about a year and a half old so I don't think that it is because I have slow
serial ports, especially since I can connect in Win98 at high speeds. Any
other suggestions?
-----Original Message-----
From: Michael Jinks <michael@twopoint.com>
To: redhat-list@redhat.com <redhat-list@redhat.com>
Date: Saturday, October 31, 1998 4:28 PM
Subject: Re: Minicom lag problem
>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
>
>
>--
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