Edit: Resolved (See next post)
Unfortunately this doesn't seem to work for me, and I'm kind of at a loss.
I've followed these instructions (and done a clean reinstall and tried again) and for some reason I just get stuck at a black screen with, if I'm lucky, a blinking cursor. I was able to switch to a vterm and pull this from the X11 logs:
firegl_SetSuspendResumeState Failed -9
Also, I noticed that during bootup, I see a "address space collision on of device" message pop up. I'm not sure if it's related since I think it's referring to device 0:0:0, it's kinda writing on top of other text at the time.
This system previously ran Mint 9 with the ATI proprietary drivers with no issue. Unfortunately, I seem kinda forced to use the proprietary drivers because I'm running audio over HDMI to a TV, and between the audio and the overscanning problems I can't really stick with that.
Can anyone offer any suggestions?