This means that my laptop should at least be usable until I'm able to get it fixed. The great thing about this little utility is that it lets me disable dynamic switching of the graphics chips and set the graphics to use the integrated chip. As soon as I set it to the discrete chip, the screen when all blue and liney on me, and after I force-rebooted I got all the symptoms of my problem.
APPLE 2011 MACBOOK PRO GRAPHICS CHECK FREE
I installed a free utility called gfxCardStatus that lets you know whether whether the integrated or discrete graphics chip is being used, and also lets you manually set it to one or the other. Update: I think the problem is related to the discrete graphics card (The AMD Radeon HD 6750M). I don't really know if pressing that particular combination actually helps at all - maybe it just randomly works after "turning it off and on again". the keyboard combination) doesn't always work the first time. Apparently it's not there for systems running OS X 10.8.4 and above (I read that in one of the Apple docs although I don't have a reference to it this instant.)Įdit: I should mention that the fix (i.e. I couldn't get into Apple Hardware Test (AHT) even though I tried pressing D during startup. Question is, how do I go about diagnosing the problem? (I suspect it might be a problem with the GPU or RAM.) Since then I've only been able to use the system for a few minutes before the problem reoccurs. Force rebooting led to the same problems again, and I was able to "fix" it again, same as before - except this time round it only worked for a few minutes before the problem recurred (this time initiated by the screen turning a pure blue). I was able to use my laptop normally for a couple of hours when suddenly the screen went completely red as I watching a video online. Upon turning on the laptop, the screen looked normal again, and the system booted as usual and I was able to log in. (Note that I did it while my system was already running, even though the procedure outlined by Apple requires that it be done while the computer is off.) In the end what appeared to help was pressing the Shift + Control + Option + Power Button key combination (related to resetting the SMC) on the aforementioned pure gray screen, which would cause the system to instantly switch off. (FWIW, in text mode, the screen appeared normal.) exiting after the HD check didn't do any good though, and the system hung up again. I was able to reach single user mode (CMD + S) where I did fsck and the hard disk seemed to be OK. After rebooting several times with the same result, I tried the different startup key sequences. After a while the screen would transition to a purely gray one and the system would be nonresponsive (without ever having reached the login screen). (I just mentioned the OS for the sake of completeness I have a strong feeling that it's a hardware problem and has nothing to do with the OS.)Īfter forcing a reboot, I got the gray screen with the Apple logo and the spinner - except the display wasn't quite right: the entire screen was distorted by narrow white horizontal lines running across it.
Today while I was routinely using my Macbook Pro 15" from early 2011 (model MacBookPro8,2), running Mavericks DP3, the screen suddenly went all glitchy and distorted and the system locked up.
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