Download your favorite Linux distribution at LQ ISO.
Go Back > Forums > Linux Forums > Linux - Hardware
User Name
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?


  Search this Thread
Old 02-22-2005, 11:57 PM   #1
LQ Newbie
Registered: Nov 2004
Location: Singapore
Posts: 2

Rep: Reputation: 0
serial port not working.

Hi everyone,

First of all thank for viewing my thread and me now is facing a serial port problem on redhat 2.1 AS. Basically i using the serial port for my APC but the problem is that the two of them unable to communicate for each other. So i did a test on my APC on other server everything fine. just to check with u all guys out there, how to verify my serial port is working a not?

Thank for you help

Old 02-23-2005, 12:08 AM   #2
Wim Sturkenboom
Senior Member
Registered: Jan 2005
Location: Roodepoort, South Africa
Distribution: Ubuntu 12.04, Antix19.3
Posts: 3,794

Rep: Reputation: 282Reputation: 282Reputation: 282
Check BIOS to see if ports are enabled.
Create a little loopback device (subD with pin 2 and pin 3 connected to each other) and use minicom to check if you can see communication.
If hardware handshaking is required by the APC, and you want to simulate it with the loopback device, short the required pins, enable handshake in minicom and check if it works.

With the loopback device, anything you type should show (if local echo is on even twice).


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
linux serial port to router console port connection? frankie_fix Linux - General 3 02-26-2007 09:32 PM
Using serial port card(PCMCIA) with IPAQ running Linux, can't find ttyS0 port d2army Linux - Laptop and Netbook 0 11-12-2005 08:07 PM
Using an USB port as a standard DB9 Serial Port Lsteele Linux - Newbie 1 10-22-2005 09:48 AM
Verify Serial Port is Working spelltoronto Linux - Newbie 2 05-25-2005 03:58 PM
RedHat 9 PS/2 mouse on serial port: not working neylitalo Linux - Hardware 1 09-05-2004 04:33 PM > Forums > Linux Forums > Linux - Hardware

All times are GMT -5. The time now is 06:27 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration