Currently Being ModeratedJun 29, 2013 3:02 PM (in response to quickienowicki)
If that were an Analog TV set, that picture would say "lost your Horizontal Hold".
I expect that means, in digital terms, you have partially disconnected or damaged the cables running to the display. They go through the hinge area, and are subject to a lot of stress.
The only thing I can think of to check is that the screen resolution is not set to something wacky. Then it's a trip to the Apple dealer.Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
Currently Being ModeratedJun 29, 2013 3:10 PM (in response to quickienowicki)
I would guess that your 2011 MBP has both the integrated graphics card and a dedicated/discreet graphics card. Most likely Photoshop is forcing the system to switch to the dedicated card and it could have an issue with it's dedicated VRAM, or with the drivers.
You could try downlaoding the gfxCardStatus app and see if the problems are happening only when it is on one or the other of the two graphics cards. You might even be able to try to force teh system to use one one of the two and see if it still has the same problem. If it only happens with one and can be reproduced it should be covered under Appleare if you have that for your system.
Currently Being ModeratedJun 29, 2013 4:12 PM (in response to quickienowicki)
So I tried what GeekBoy.from.Illinois and turned off the GPU that Photoshop wanted to use. And for a while I was able to edit a bit more and then it happened again. Could it be bad RAM?
Currently Being ModeratedJun 29, 2013 4:52 PM (in response to quickienowicki)
If you want to check the RAM you can run the Apple Hardware Test. You may need to use OPTION D to start it:
For a more thorough RAM test, download Rember from the Kelly Computing web site and run the test over night so you can get sufficient loops.