Hi,
Well I donot know about Mandriva, but if you want to do it on your own, then there are a number of tutorials, howtos and links about getting IRDA working on Toshiba laptops here:
http://irda.sourceforge.net/smcinit/
If you need any help from my side, you are always welcome. I have recently got irda stuff working on my toshiba M30-742 laptop that too after banging my head against the wall for nearly a month. If you want to read my story, you can read it here:
http://forums.gentoo.org/viewtopic-t...-cyberjun.html
cheers,
--cyberjun