We help IT Professionals succeed at work.

We've partnered with Certified Experts, Carl Webster and Richard Faulkner, to bring you two Citrix podcasts. Learn about 2020 trends and get answers to your biggest Citrix questions!Listen Now

x

modem setting

wini072297
wini072297 asked
on
Medium Priority
259 Views
Last Modified: 2013-12-15
i use redhat 3.0.3 with kernel 2.0.30. how to set modem in com3 IRQ 5 in linux? usually com3 is IRQ4 but i want it to 5(i set the jumper  5). the device is cua2 which i believe right.
the reason is the my 33.6 modem is extremely slow(few characters per minute) in linux so terminal software(like minicom) and PPPd don't work. someone suggest it may be the wrong IRQ of modem in linux.
Comment
Watch Question

Commented:
Basically, you must use the /bin/setserial command to specify your particular setting to the serial driver. This can be easily accomplished by taking the following steps :

1) Look up your /etc/rc.d directory for a script named rc.serial. If it does exist, rename it to something else.

2) Create a new rc.serial file as follows (2 lines) :

#!/bin/sh
/bin/setserial /dev/cua2 port 0x03e8 irq 5 uart 16550A spd_vhi

3) Make the file executable (chmod +x)

4) Run the file, watch for system messages. If you get any, add "skip_test" to the setserial command-line (see man setserial for an explaination)

5) Make sure that your /etc/rc.d/rc.sysinit contains a line to run /etc/rc.d/rc.serial

Good luck.

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts
XMS

Commented:
Correction : At step 4, use the "skip_test" parameter if you get any _ERROR_ messages. :) Sorry.

Author

Commented:
is setserial builtin command in linux? i don't think there is rc.serial file there in rc.d, so just create it anyway? someone said i should download a program called setserial from some site.
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.