How to downgrade the kernel?

[geronimo66]

Hello,

since the issue I'm having with the unsupported control of the fan of the Toshiba Satellite seems to be unsolvable, the only way remaining is the downgrading of the kernel.
( http://ubuntuforums.org/showthread.php?p=11351871 ).
Is here someone to tell
1) where I may get an ubuntu-kernel of maybe 2.6.32 or lower?
2) are there any serious obstacles to set an old kernel up within a newer distribution (I'm running natty) fully functional?

thanx for helping

geronimo

[dino99]

sudo apt-get install toshset

http://kernel.ubuntu.com/~kernel-ppa/mainline/

chosse an empty folder to download your kernel (2 headers + 1 image)
cd to that folder, then: sudo dpkg -i *.deb