I am running Fedora FC 4 on an Acer TravelMate 290. Usually, when I can't connect to the Internet using wifi or ethernet, I use my IR port (ttyS2) to connect through my GPRS phone, using the GPRS Easy Connect (gprsec) application. This has always worked fine, even back when I was using FC3.

I recently upgraded from kernel 2.6.15-1.1833_FC4, from 2.6.15-1.1833_FC4. Using the new kernel, I cannot connect. I get an error saying /dev/ttyS2: no such file or folder. When I run

$ dir /dev/ttyS*

it shows me that ttyS0 and ttyS1 exist, but not ttyS2 (or ttyS3, which has always existed under previous kernels).

It's not an /etc/sysconfig/irda issue, I've already checked that and the file has not changed.

Anyone else run into this? Any suggestions on how to fix it?

Maybe the Device is called /dev/irda now.
This depends on the udev-Rule.

Thanks, tuxangler.

Nope, there is no such device as /dev/irda either. The set of udev rule files in /etc/udev/rules.d/ remains exactly the same regardless of which of the two kernels I boot (and the files in that directory don't change), but the earlier kernel (2.6.15-1.1833_FC4) creates the ttyS2 device, while the most recent one (2.6.15-1.1833_FC4) does not.

Do you have "Support for more than two serial Ports" compiled in?

I have always used the precompiled kernel that Fedora releases as an RPM. I've never had to add in any kind of module or compile the kernel myself. Is this something I now need to do?

The one time that this happened to me in the past (I think it was with FC3 or a very early version of FC4), it fixed itself on the next kernel release. I'm just wondering why this has happened and if anyone else has ever run into it, and whether there's an easy fix.

Thanks, tuxangler, for your patience in answering my questions.

Take a look at /etc/udev/rules.d/
There could be a file like this:
This is the File for my Infrared-Remote-Control.
You could modify it for your irda-Port.

And under /dev there are also Devices called "ircomm". Whats this?

This file could help you too
ftp://rpmfind.net/linux/fedora/core/....16-7.i386.rpm