3 Replies Latest reply: Feb 22, 2013 9:16 AM by unsu
unsu Level 1 Level 1 (10 points)

Periodically, when I am browsing Safari, my 15 retina MBP freeses. I did a force restart and looked at Console messages. Before it froze, there were many messages like this:

 

2013-01-01 8:43:23.000 PM kernel[0]: ****  Debug info for *possible* hang in MAIN graphics engine  ****

2013-01-01 8:43:23.000 PM kernel[0]: ring head    = 0xfb60c500, wrap count = 2011

2013-01-01 8:43:23.000 PM kernel[0]: ring tail    = 0x0000d110

2013-01-01 8:43:23.000 PM kernel[0]: ring control = 0x0000f001   enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

2013-01-01 8:43:23.000 PM kernel[0]: timestamps = 0x786523

2013-01-01 8:43:23.000 PM kernel[0]: Semaphore register values:

2013-01-01 8:43:23.000 PM kernel[0]: VRSYNC: (0x12044) = 0x786523

2013-01-01 8:43:23.000 PM kernel[0]: BRSYNC: (0x22040) = 0x0

2013-01-01 8:43:23.000 PM kernel[0]: RVSYNC: (0x 2040) = 0x0

2013-01-01 8:43:23.000 PM kernel[0]: BVSYNC: (0x22044) = 0x0

2013-01-01 8:43:23.000 PM kernel[0]: RBSYNC: (0x 2044) = 0x0

2013-01-01 8:43:23.000 PM kernel[0]: VBSYNC: (0x12040) = 0x0

2013-01-01 8:43:28.000 PM kernel[0]: stampWait: Overflowed checking for stamp 0x786530 on MAIN ring: called from

2013-01-01 8:43:28.000 PM kernel[0]: timestamp = 0x786523

 

etc. (all other are similar)

 

Any ideas?
Thanks a lot in advance!


MacBook Pro with Retina display, OS X Mountain Lion (10.8.2)
  • 1. Re: Please help resolve 15 rMBP freezing issue
    Linc Davis Level 10 Level 10 (117,790 points)

    Make a "Genius" appointment at an Apple Store to have the machine tested.

    Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.

    *An SSD doesn't need to be zeroed.

  • 2. Re: Please help resolve 15 rMBP freezing issue
    Chuck Gould Level 1 Level 1 (85 points)

    Check out recent posts to this thread: https://discussions.apple.com/message/21306602#21306602

     

    (I just posted to it myself, yesterday). It sounds like a driver issue (I hope...).

  • 3. Re: Please help resolve 15 rMBP freezing issue
    unsu Level 1 Level 1 (10 points)

    Ok I just want to update my post to give some information to folks with the same problem.

    I made an appointment with the genius bar and they took my retina macbook for tests. They told me they were going to replace the logic board to eliminate the freezing issue. There were two weeks and a half now since it's been replaced, and no freezing since then. I assume they fixed the issue by replacing the logic board.

     

    However, in the logs I found one kernel message "kernel[0]: ****  Debug info for *possible* hang in MAIN graphics engine  ****", but no freezing occured. I conclude they may have manufacturing defects. This is a common problem guys. To to your local Apple store and ask them to fix the freezings. New macbooks MUST work flawlessly. Freezings are NOT normal.

     

    PS you may stop the issue yourself by disabling the automatic switching of the graphic cards. I personally never observed freezings with the automatic switching disabled. Or ask Apple to fix the issue. You choice.