I have Samsung R430/P430 and MacBook Pro. The Samsung R430/P430 have Ubuntu and Windows 7 Ultimate. But in MacBook Pro is running Mac OS X 10.7/10.8. It has 100GB+ internal hard drive. Can i run 32-bit Ubuntu alongside Mac OS x?
You are not stating if you are referring to a 13" or a 15" MBP
The answer is yes you can and its quite easy to get it working if its a 13" MBP
I would install refit in OSX prior to installing Ubuntu.
Since booting OSX grub from grub never worked for me and this worked out of the box. I have never bothered to find out why it fails.
if you have a 15" MBP we would need more details to tell you if /how easy Ubuntu is to get working with it. Like exact version , and what graphic cards it has.
The 15" models are more bothersome because of the non stadard dual graphics setup.