Solved

Modem Incongruency

Posted on 1997-02-22
1
196 Views
Last Modified: 2010-03-17
I just installed Slakware 96 and everything work well except my dialup connections to my school and ISP.  When I login to my school using minicom, I lose quite a few charaters in the transmission.  When I try to run pine at school, you can imagine the confusion.  I have set no echo, vt102 mode, and my setserial command in the rc.serial is manual with spd_vhi at the end because I have a USRobotics Sportster 28.8.  Also when I run seyon, I notice the default speed is 9600, and when I change it to 38400, I can't save it.  Starting up seyon again brings up the 9600bps.  This has ramifications for problems with my ppp connection which I won't go into, except to say that minicom keeps reporting the message: 'cua2: x input overruns' (with x < 5).  Thanks for your help.
0
Comment
Question by:emart
1 Comment
 
LVL 1

Accepted Solution

by:
mart010897 earned 50 total points
Comment Utility
Hi,

What you most likely have is a 16450 UART serial port or some other inadequate UART chip.  You can verify this by looking at the output of the "dmesg" command.  Look for the lines that say tty at the beginning-- it will tell you what type of UART it is.  Basically, at higher serial speeds, the buffers of some UARTs get overrun.

Most of the time you can upgrade your UART chip in place to take advantage of higher serial speeds.  You can consult your local PC-superstore or whatever to get details for your hardware.

Until you can get the upgraded serial chip, you are going to have to connect at lower speeds-- just set your serial port down to 38400 or so and it should stop losing data.

If an inadequate UART is not the problem, then you most likely have a cable problem.  You can try changing serial cables if you like.  But I've had the UART problem before, and it's exactly the symptoms you are describing.

Hope this helps...

Mart
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

Suggested Solutions

I have seen several blogs and forum entries elsewhere state that because NTFS volumes do not support linux ownership or permissions, they cannot be used for anonymous ftp upload through the vsftpd program.   IT can be done and here's how to get i…
Note: for this to work properly you need to use a Cross-Over network cable. 1. Connect both servers S1 and S2 on the second network slots respectively. Note that you can use the 1st slots but usually these would be occupied by the Service Provide…
This video discusses moving either the default database or any database to a new volume.
Excel styles will make formatting consistent and let you apply and change formatting faster. In this tutorial, you'll learn how to use Excel's built-in styles, how to modify styles, and how to create your own. You'll also learn how to use your custo…

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

6 Experts available now in Live!

Get 1:1 Help Now