I have installed Gutsy64bit on this machine from scratch. Now this
system can hibernate (it did so several times this week) and even
suspend to disk without "too much problems".

For hibernation I did anything, it just worked. To make suspend working I had 
to work:
I tried to add this i8042.nomux to the boot parameters (edit 
/boot/grub/menu.lst and append this to the kopt commented in the stanta and 
execute "update-grub"). Now the system can suspend to ran and the mouse works 
as expected. However, the LID closure event is not sent, and I cannot convince 
the machine to suspend when I close the LID.

Adding the parameter i8042.reset does the trick. I don't have enough
statistics yet, but about 90% of the time the LID closure event is sent
properly.

I have documented this in
https://wiki.ubuntu.com/LaptopTestingTeam/Lenovo3000N100_0768 , and the
original idea came from the Gentoo Wiki: http://gentoo-
wiki.com/HARDWARE_Lenovo_3000_N100

I would be glad if someone can explain what those options do :)

-- 
Lenovo 3000 N100 overheats when running 2.6.20-15-generic
https://bugs.launchpad.net/bugs/114312
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