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Level 1

19 points

Mountain Lion Screen Freeze

Hello,

the cursor freezes sometimes, but even when it moves I cannot make anything happen with it except Shut Down, the track pad is unresponsive, and the screen is frozen, and sometimes there are some problems with graphics:

This is what happens repeatly before the boot time:

8/9/12 6:19:29.000 PM kernel[0]: stampWait: Overflowed checking for stamp 0x9b4cefa on MAIN ring: called from

8/9/12 6:19:29.000 PM kernel[0]: timestamp = 0x9b4cef8

8/9/12 6:19:29.000 PM kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

8/9/12 6:19:29.000 PM kernel[0]: ring control = 0x0000f401 enabled, auto report disabled, not waiting, semaphore is waiting, length = 0x010 4KB pages

8/9/12 6:19:29.000 PM kernel[0]: timestamps = 0x9b4cef8

8/9/12 6:19:29.000 PM kernel[0]: VRSYNC: (0x12044) = 0x9b4cef8

8/9/12 6:19:29.000 PM kernel[0]: BRSYNC: (0x22040) = 0x0

8/9/12 6:19:29.000 PM kernel[0]: BVSYNC: (0x22044) = 0x0

8/9/12 6:19:29.000 PM kernel[0]: RBSYNC: (0x 2044) = 0x0

8/9/12 6:19:29.000 PM kernel[0]: VBSYNC: (0x12040) = 0x0

8/9/12 6:19:29.000 PM kernel[0]: stampWait: Overflowed checking for stamp 0x9b4cf0d on MAIN ring: called from

8/9/12 6:19:29.000 PM kernel[0]: timestamp = 0x9b4cef9

8/9/12 6:19:29.000 PM kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

8/9/12 6:19:29.000 PM kernel[0]: ring control = 0x0000f401 enabled, auto report disabled, not waiting, semaphore is waiting, length = 0x010 4KB pages

8/9/12 6:19:29.000 PM kernel[0]: timestamps = 0x9b4cef9

8/9/12 6:19:29.000 PM kernel[0]: VRSYNC: (0x12044) = 0x9b4cef9

8/9/12 6:19:29.000 PM kernel[0]: BRSYNC: (0x22040) = 0x1

8/9/12 6:19:29.000 PM kernel[0]: BVSYNC: (0x22044) = 0x0

8/9/12 6:19:29.000 PM kernel[0]: RBSYNC: (0x 2044) = 0x0

8/9/12 6:19:29.000 PM kernel[0]: VBSYNC: (0x12040) = 0x0

8/9/12 6:19:34.000 PM kernel[0]: stampWait: Overflowed checking for stamp 0x9b4cf45 on MAIN ring: called from

8/9/12 6:19:34.000 PM kernel[0]: timestamp = 0x9b4cf25

8/9/12 6:19:34.000 PM kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

8/9/12 6:19:34.000 PM kernel[0]: ring control = 0x0000f401 enabled, auto report disabled, not waiting, semaphore is waiting, length = 0x010 4KB pages

8/9/12 6:19:34.000 PM kernel[0]: timestamps = 0x9b4cf25

8/9/12 6:19:34.000 PM kernel[0]: VRSYNC: (0x12044) = 0x9b4cf25

8/9/12 6:19:34.000 PM kernel[0]: BRSYNC: (0x22040) = 0x1

8/9/12 6:19:34.000 PM kernel[0]: BVSYNC: (0x22044) = 0x0

8/9/12 6:19:34.000 PM kernel[0]: RBSYNC: (0x 2044) = 0x0

8/9/12 6:19:34.000 PM kernel[0]: VBSYNC: (0x12040) = 0x0

8/9/12 6:19:34.000 PM kernel[0]: stampWait: Overflowed checking for stamp 0x9b4cf59 on MAIN ring: called from

8/9/12 6:19:34.000 PM kernel[0]: timestamp = 0x9b4cf27

This is what I found just before the boot time:

8/9/12 6:24:20.000 PM kernel[0]: stampWait: Overflowed checking for stamp 0x9b4cfe7 on MAIN ring: called from

8/9/12 6:24:20.000 PM kernel[0]: timestamp = 0x9b4cf9a

8/9/12 6:24:20.000 PM kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

8/9/12 6:24:20.000 PM kernel[0]: ring head = 0x86a077a4, wrap count = 1077

8/9/12 6:24:20.000 PM kernel[0]: ring tail = 0x0000b910

8/9/12 6:24:20.000 PM kernel[0]: ring control = 0x0000f401 enabled, auto report disabled, not waiting, semaphore is waiting, length = 0x010 4KB pages

8/9/12 6:24:20.000 PM kernel[0]: timestamps = 0x9b4cf9a

8/9/12 6:24:20.000 PM kernel[0]: Semaphore register values:

8/9/12 6:24:20.000 PM kernel[0]: VRSYNC: (0x12044) = 0x9b4cf9a

8/9/12 6:24:20.000 PM kernel[0]: BRSYNC: (0x22040) = 0x1

8/9/12 6:24:20.000 PM kernel[0]: RVSYNC: (0x 2040) = 0x0

8/9/12 6:24:20.000 PM kernel[0]: BVSYNC: (0x22044) = 0x0

8/9/12 6:24:20.000 PM kernel[0]: RBSYNC: (0x 2044) = 0x0

8/9/12 6:24:20.000 PM kernel[0]: VBSYNC: (0x12040) = 0x0

8/9/12 6:24:20.000 PM kernel[0]: trying to clear semaphore wait on MAIN ring

8/9/12 6:24:20.000 PM kernel[0]: After attempt to clear semaphore wait = 0x0000f001 no longer waiting

8/9/12 6:24:24.997 PM coreservicesd[31]: SendFlattenedData, got error #268435460 (ipc/send) timed out from ::mach_msg(), sending notification kLSNotifyApplicationDeath to notificationID=207

8/9/12 6:24:24.997 PM coreservicesd[31]: SendFlattenedData, got error #268435460 (ipc/send) timed out from ::mach_msg(), sending notification kLSNotifyApplicationDeath to notificationID=214

8/9/12 6:24:24.000 PM kernel[0]: stampWait: Overflowed checking for stamp 0x9b4cfdf on MAIN ring: called from

8/9/12 6:24:24.000 PM kernel[0]: timestamp = 0x9b4cf9c

8/9/12 6:24:24.000 PM kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

8/9/12 6:24:24.000 PM kernel[0]: ring head = 0x86a07864, wrap count = 1077

8/9/12 6:24:24.000 PM kernel[0]: ring tail = 0x0000ba48

8/9/12 6:24:24.000 PM kernel[0]: ring control = 0x0000f401 enabled, auto report disabled, not waiting, semaphore is waiting, length = 0x010 4KB pages

8/9/12 6:24:24.000 PM kernel[0]: timestamps = 0x9b4cf9c

8/9/12 6:24:24.000 PM kernel[0]: Semaphore register values:

8/9/12 6:24:24.000 PM kernel[0]: VRSYNC: (0x12044) = 0x9b4cf9c

8/9/12 6:24:24.000 PM kernel[0]: BRSYNC: (0x22040) = 0x1

8/9/12 6:24:24.000 PM kernel[0]: RVSYNC: (0x 2040) = 0x0

8/9/12 6:24:24.000 PM kernel[0]: BVSYNC: (0x22044) = 0x0

8/9/12 6:24:24.000 PM kernel[0]: RBSYNC: (0x 2044) = 0x0

8/9/12 6:24:24.000 PM kernel[0]: VBSYNC: (0x12040) = 0x0

8/9/12 6:24:24.000 PM kernel[0]: trying to clear semaphore wait on MAIN ring

8/9/12 6:24:24.000 PM kernel[0]: After attempt to clear semaphore wait = 0x0000f001 no longer waiting

8/9/12 6:24:52.000 PM bootlog[0]: BOOT_TIME 1344554692 0

Thank you in adavnace

Sebastian

MacBook Air, OS X Mountain Lion

Posted on Aug 9, 2012 5:20 PM

185 replies

unsu

Level 1

19 points

Nov 23, 2013 2:46 PM in response to sdaza

This is a hardware problem.

I had this freezing issue before. Apple store replaced my logic board. It's been 10 months and no freezes any more.

If you still have warranty, ask them to fix your Mac.

Nov 23, 2013 3:00 PM in response to unsu

That makes me sad. I assumed it was a internal GPU issue but was hoping it wasn't. It's out of warranty and if the logic board needs to be replaced I hope it doesnt cost too much.

I rather pick up an updated Mini if they're ever released.

Smudge

Level 1

131 points

Nov 26, 2013 10:33 PM in response to unsu

Unsu, if you could look up your support case in https://supportprofile.apple.com/ and post the case number where you got it replaced, it could help me to get my case resolved.

Thanks

Pagedan

Level 1

4 points

Aug 8, 2014 6:29 AM in response to sdaza

having the same problem on a 13" MBP running 10.9.4, 16GB RAM

Really don't believe this is a hardware problem. Usually happens waking from sleep, never when i am using. Originally thought it was some new software, but have stopped using it and still happening. Only fix is to power off by holding power button.

same **** Debug info for *possible* hang in MAIN graphics engine **** in the logs coincide with the freeze. Tried force-quitting every app.. still no good.

J-Pro

Level 1

8 points

Sep 11, 2014 7:57 PM in response to sdaza

Just saw folks replying to this thread about similar issue in Mavericks... I want to mention that I have the same issue and it started appearing in Mavericks as well. Therefore I have created new thread in Mavericks section with all details I have found about it. Hopefully we'll find a solution...

Mountain Lion Screen Freeze