my freezes are a little different,
i think both times it happened, i was interacting with the DOCK
i clicked on the icon of Evernote. After that, the screen freezed.
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I get this repeated in my logs at the time of the crash:
I found the same into my system.log. Around this time my MBP freezed.
Aug 9 15:45:41 xxx kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****
Aug 9 15:45:41 xxx kernel[0]: ring head = 0x0c607ec4, wrap count = 99
Aug 9 15:45:41 xxx kernel[0]: ring tail = 0x00008d68
Aug 9 15:45:41 xxx kernel[0]: ring control = 0x0000f401 enabled, auto report disabled, not waiting, semaphore is waiting, length = 0x010 4KB pages
Aug 9 15:45:41 xxx kernel[0]: timestamps = 0x1a98d05
Aug 9 15:45:41 xxx kernel[0]: Semaphore register values:
Aug 9 15:45:41 xxx kernel[0]: VRSYNC: (0x12044) = 0x1a98d05
Aug 9 15:45:41 xxx kernel[0]: BRSYNC: (0x22040) = 0x1
Aug 9 15:45:41 xxx kernel[0]: RVSYNC: (0x 2040) = 0x0
Aug 9 15:45:41 xxx kernel[0]: BVSYNC: (0x22044) = 0x0
Aug 9 15:45:41 xxx kernel[0]: RBSYNC: (0x 2044) = 0x0
Aug 9 15:45:41 xxx kernel[0]: VBSYNC: (0x12040) = 0x0
Aug 9 15:45:41 xxx kernel[0]: trying to clear semaphore wait on MAIN ring
Aug 9 15:45:41 xxx kernel[0]: After attempt to clear semaphore wait = 0x0000f001 no longer waiting
Aug 9 15:45:46 xxx kernel[0]: stampWait: Overflowed checking for stamp 0x1a98d28 on MAIN ring: called from
Aug 9 15:45:46 xxx kernel[0]: timestamp = 0x1a98d07