I have a macbook pro 8.2 15" (early 2011) and I have an issue installing Ubuntu. I have tried installing Ubuntu 12.04, 12.10 and 13.04. I have the same problems with all versions. I have tried both dvd install and usb install. I freed 60gb from my hard drive for Ubuntu and proceeded to install.
I can boot to the normal screen where I can choose to Try Ubuntu or Install. When I choose Install, I end up with frozen black screen. I tried installing with "nomodeset" command. At first I see something happening in text form but it still freezes soon.
Then somehow I figured out the issue might be my graphics card (this mac has ATI radeon 6490M and integrated Intel HD graphics 3000). I booted again with "radeon.modeset=0". Now I'm able to the very end of the installation procedure, but after rebooting I it gives me a window which says "the system is running in low graphics mode" and sends me to the command line.
I checked the error logs and it says something like "screens found but none have usable configuration" and some fatal error afterwards "no screens found"
So the problem is nasty. If I try to install with only "nomodeset" I won't get too far with the install, and when I install with "radeon.modeset=0" I get to install the whole thing but evidently its not working :D. After installing with "radeon.modeset=0" I even installed lynx and downloaded latest drivers from ATI web page and installed them in command line, but it wasn't much of help.
Please help me, I have been fighting with this about 14 hours now...