After 5 days of beautiful performance on my early 2011 mbp, it turns out I'm in the same boat as the rest of you after all. Last night, with many windows and Firefox and Safari browser pages open, in FF, I did a google search, then clicked on a local top story page. Clicking on this local news web site always had a tendency to freeze my mpb whenever I clicked on their news video. Last night, just loading their web page gave me my first striped screen freeze. (I've already encountered just about every other type of screen when my mbp was broken).
Back to square 1. Tried rebooting many ways including internet recovery, but consistently got the initial apple screen, then a plain gray screen or dark charcoal gray screen. Every unsuccessful reboot and frozen screen, the fans start up at high rpm and that area gets hot. Then try the next boot.
Eventually I was able to login and all was beautiful again. Clicked the Auto Switching in Energy Saver without issue. Ran a few tests, checked to see which GPU was in use and it was the Intel 3000 HD. I wanted to force the AMD 6750M to engage, so I started up a youtube video. No problem and still only the Intel GPU was engaged. Started the same video on another page (2 videos running), no problem, still only the Intel 3000 gnu engaged. Started the same video on a 3rd page and within seconds, screen and mbp froze. I assume the AMD 6750M tried to engage.
Great difficulty getting a login screen again. Went to bed. This morning booted right up and working fabulously once again. Apparently so long as the AMD 6750 does not try to engage.
Last night early in my research, I checked to see if per chance FireFox or Adobe Flash might be the cause and found a few questionable stories, but I'm guessing they just clicked on something that caused the AMD chip to kick in.
Anyway, after enduring highly questionable performance for months averaging several freezes each week eventually getting to the first split screen/freeze. I see 2 Scenarios once this nasty finally rears its ugly head in full force:
Scenario number 1
From that first encounter with a split screen onward, if one can login again, poor performance, system entirely unstable, routine crashes/freezes multiple times daily from that day forward, cooling fans kick in quickly, system runs hot. mbp near worthless as it quickly progresses to the point of worthlessness (maybe a few weeks only).
Scenario number 2
When attempting to fix Scenario number 1, something inadvertently gets cleaned up, flag is set or reset, etc, so that system will then run like brand new if/when you're able to login again. In my case, when the mbp was at its very worst, I performed an internet recovery and at that time I figured what the **** and upgraded to Mavericks OS. Something occurred during that upgrade to restore complete stability and confidence with my mbp allowing it to run for 6 days like brand new again. Apparently, so long as it does not attempt to engage the AMD 6750M.
(BTW, since the Mavericks upgrade resetting some file or flag that allows my mbp to run like new, last night when I encountered the problem, the corrupted reboots were far more consistent in their behavior and patterns. Prior to last week's upgrade, I'd get all kinds of screens and freezes, like a box of chocolates, I never knew what I was going to get. But also, with this recent (last night) corrupt reboot consistency, it was more difficult to get to a login prompt.)
So today, my mbp is back up and running like new (for now) and presumably so long as the AMD chip does not engage.
So I'm thinking of downloading that xgpu tool that keeps the AMD chip from engaging. If that tool actually works, then at least I can I can have a normal operating mbp and run with confidence but I just can't do anything too graphic intensive. I suppose a broken mbp running at 75% of its potential sure beats running at 20% of its potential. What's the name of that software tool again?
But now that I finally realize exactly what you guys have realized for quite some time with the problem is centered on the AMD chip and/or logic board, I'm very disappointed in Apple's apparently refusal to take full responsibility for this and step forward with a recall program.
Apple's behavior and refusal to fully engage regarding this matter is completely unacceptable.