Read http://www.desktoplinux.com/news/NS5930102209.html
It seems that we should spend some time with Mandriva 2010,
I just installed the RC2 version of Mandriva 2010. It detects the Poulsbo chipset fine, and everything goes well until I want to start the X server. Here I don't have the psb module - which is not located in the i586 DVD I installed from.
I did try "uprmi -a psb", but that went too far off....
I will now try with the ONE version of the 2010 RC2 - there the needed driver should be there.
If you get more success mail me

Best Peter <pto@linuxbog.dk>