Description of problem:
If you configure irda stack via /etc/sysconfig/irda by giving the
proper serial port, irattach does not start on kernel 2.6 besause of
it unable to load tty-ldisc-11. The problem caused by a mistyped line
in /etc/modprobe.conf.dist:
alias tty-ldisc-11 irtty

Version-Release number of selected component (if applicable):
modutils-2.4.25-13

How reproducible:
always

Steps to Reproduce:
1. Configure irda
2. Try to start it
3.
  
Actual results:
Irda does not start:

Expected results:
Irda starts.

Additional info:
You should to change the line in /etc/modprobe.conf.dist
alias tty-ldisc-11 irtty
to
alias tty-ldisc-11 irtty-sir
because of the name of the driver was changed.