edit: I know that I am generally ignorant of Linux and computers in general, but I did do a lot of research on my own before asking for help.
I use an AMD A10-5800K APU with Radeon HD 7660D
So far, I've got ubuntu installed but I've had to insert "nomodeset" when booting or otherwise the screen becomes extremely squished and jittery.
I could edit the grub file in etc/default to fix that problem, but there's no resolution option for my display so I still wouldn't be able to use the default driver.
I tried the two alternative drivers in the Additional Drivers tab in Software Sources; they didn't require nomodeset and had much more acceptable (but not perfect) resolution options, but they broke Unity.
I tried installing AMD's latest stable Catalyst driver with an installation program I found online, but that didn't appear to do anything but "break packages" (not sure what that means, but it sounds bad).
Also, Compiz crashes multiple times when I first run Software Updater after an install.
I just did a fresh install and did the nomodeset thing at boot, but have done nothing else.