Linux - NewbieThis Linux forum is for members that are new to Linux.
Just starting out and have a question?
If it is not in the man pages or the how-to's this is the place!
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
I run dual boot Windows95/Linux Redhat 9 on a computer with a PnP Bios.
Under Linux there is an IRQ conflict between the serial mouse on COM1 and the PnP modem on COM3 where both want to use IRQ 4. There is no conflict under Windows, where the modem uses IRQ 10.
I would like to change the IRQ for either the mouse or the modem. I have tried using setserial to change IRQ for ttyS0 (mouse on COM1), but get an error message that the mouse is in use and so the IRQ cannot be changed.
Linux does not allow me to make changes to the file /proc/isapnp where the IRQ 4 is listed for the modem.
Please has anyone suggestions for resolving the conflict.
I had this sort of thing in the past before retiring my modem and ISA soundcard. I think I found some setting in the BIOS which reserved certain IRQs for PnP or hardwired devices, and fixed the problem.
There is also a kernel parameter 'isapnp_reserve_irq=' which I don't recall ever using, but looks promising.
Finally there is a set of tools called 'isapnp' or 'isapnptools' which use a configuration file to negotiate with any PnP devices on start-up. I seem to recall I found understanding this pretty heavy going.
Distribution: RH 6.2, Gen2, Knoppix,arch, bodhi, studio, suse, mint
what is on com 2? if nothing, put your mouse there.
change the bios setting "Plug n' Play OS installed" to no
change the bios setting for serial port 1 to a different irq
change the bios settings to reserve irq's 3 and 4.
I had the same problem. My modem jumpers were set to IRQ 3 and port 4, and this was the only way it worked in Windows. But it didn't under Linux.
I used BIOS setup to use IRQ 4 for both internal serial ports, and it worked, but things got a bit messed up because now COM 2 became COM 3
Serial driver version 5.05c (2001-07-08) with MANY_PORTS MULTIPORT SHARE_IRQ SERIAL_PCI enabled
ttyS0 at 0x03f8 (irq = 4) is a 16550A
ttyS2 at 0x03e8 (irq = 4) is a 16550A
ttyS3 at 0x02e8 (irq = 3) is a 16550A
I have a drawing tablet attached to port 2 so I had to change everything in my XF86Config from /dev/ttyS1 to /dev/ttyS2. But under windows 98 and 2000 both the modem and the tablet continued to work perfectly.