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Yesterday I just closed my mbp and this morning I had the great pleasure to have this: enter image description here

At the login (passwork) screen...

I had an uptime of more than 5 days but still ... I upgraded the memory from 4GB to 8BG (the Crucial kit) and since then I had this problem twice. Mayve it doesn't mean anything because I have the mpb for only 2 weeks and I upgraded the memory after a few days, so the statistics are maybe meaningless.

My question is: do you have this problem sometimes ? Should I check something in particular to try to avoid that ? Is it possible that the memory is incorrectly installed (very unlikely...) ? Is it in any case a memory problem ?

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This is probably what is called a "kernel panic" screen. Google for problems with RAM expanditure as well as "kernel panic" and you should definitely get some answers. – Eimantas Apr 28 '11 at 9:18
up vote 1 down vote accepted
  1. No, this is not a common issue and should not occur under normal circumstances. It's an indication that something unexpected (and unrecoverable) happened. That screen is the final net for catching a problem before your computer is completely locked.

  2. If you just got new RAM, I'd try removing it an using the computer for a few days. If the problem persists, there might be a hardware problem and since the computer is new, you can take it to an App Store.

  3. If you have "external" peripherals (drives, Audio interfaces, etc.) try working without them for a while.

Last but not least, act now that the box is new, don't let it "wait" because it didn't happen again in two weeks. If the above happened more than once in a short time frame on a new machine, there's something wrong. That's been my experience.

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OK I'll do as you suggest and go back to the old RAM. – Cedric H. Apr 28 '11 at 13:49
I left it open and when I came back a few hours later I was unable to wake it up .... black screen and I had to shut it down with the power button :( – Cedric H. Apr 28 '11 at 17:37

Most likely, it's the RAM since it's the last thing you changed.

You can check the kernel panic logs under: Console -> DIAGNOSTIC AND USAGE INFORMATION

When I had RAM problems I noticed that my KP logs weren't consistent in either the process name or backtrace, which makes sense for a RAM problem but could also apply to other hardware problems.

I was able to narrow it down to my 3rd party RAM using the stress test feature in Prime95. This was enough evidence to get replacement RAM from the merchant. Apple's hardware test never found a problem.

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What do you mean by "Apple's hardware test" ? – Cedric H. Apr 28 '11 at 17:36

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