Comment 1 for bug 104786

I found a reference in other bugs to the fact that the image loaded during a normal install may not work on older systems. The work around is to install the linux-image-386 after the normal install is finished and the continuous rebooting has started to occur.

To load the linux-image-386:

- Place the Ubuntu CD in the drive and start the install.
- Proceed through the install until you get to the part where is is going to partition the hard drives.
- Press ALT-F2 and then press enter. You are now in a black command screen.
- enter the following commands
   mkdir /mnt/temp
   mount -t ext3 /dev/hda1 /mnt/temp
   chroot /mnt/temp
   apt-get install linux-image-386

Sit back, relax and wait for the install to complete. After it completes, it should boot OK