The Pentium M and derived Celerons do not support PAE (I have one).
Originally Posted by jadtech
The OP would have to use the mini-iso to install Ubuntu with a non PAE kernel or he can use use any of the Lubuntu or Xubuntu derivitives that still have support for non-PAE CPUs.
If you want Ubuntu 12.04 you will have to install from the mini-iso cd image which has kernel support for non-PAE CPU's
Originally Posted by irv
Your other options are to use the Xubuntu or Lubuntu images that have non-PAE support and then afterwards install ubuntu from there. You're laptop is pretty old so I'm not sure how well it will handle Ubuntu, (what are the specs, CPU & RAM?) as I know my laptop will be pretty sluggish.
I would suggest you download the Xubuntu cd image and install that and see how you like it, if you still want you can then install Ubuntu from there easily, all you have to do from a terminal is:
and afterwards edit one file:
sudo apt-get install ubuntu-desktop
so the file has this specified,
sudo leafpad /etc/lightdm/lightdm.conf