MBP locks up, potentially dock-related?

[JamesHP]

Ever since I upgraded my early-2011 MBP to ML I've been having intermittent issues with my Mac locking up - the cursor is movable but cannot click or interact with anything on screen. I am also unable to do anything with the keyboard, for example change the backlight brightness. This occurs completely randomly, and I can go a whole day without it happening but I've had it happen twice in the last hour. The most recent one, about 10 minutes ago, looked like this:

Note the garbled up area where my dock would be, and also notice the iPhoto hover-over text visible. Usually the dock would be visible rahter than garbled like this, along with that text (which is frozen on the screen, even when I move the cursor away from the dock area). I've tried a clean install, and SMC and PRAM resets but no dice so far. Has anyone had this issue and/or taken it to the genius bar?

 

[iBookG4user]

Try creating a new user account (System Preferences > Users and Groups) and use that account for a day or two and see if it happens again. If it happens again it is a systemwide issue, if not it is an issue only with your account.

 

[JamesHP]

Try creating a new user account (System Preferences > Users and Groups) and use that account for a day or two and see if it happens again. If it happens again it is a systemwide issue, if not it is an issue only with your account.

Just edited my OP to add that I did a clean install approx. 3 weeks ago which did nothing. Since this failed to change anything could I assume it's systemwide? Also unsure whether or not it's hardware related, considering this never happened when it was on Lion (what it was shipped with just under 12 months ago).

 

[iBookG4user]

Just edited my OP to add that I did a clean install approx. 3 weeks ago which did nothing. Since this failed to change anything could I assume it's systemwide? Also unsure whether or not it's hardware related, considering this never happened when it was on Lion (what it was shipped with just under 12 months ago).

If it wasn't happening in Lion then it will most likely be an issue with Mountain Lion. When you did the clean install did you use Migration Assistant to put all the data back? If so then it might have brought back the problem.

 

[JamesHP]

If it wasn't happening in Lion then it will most likely be an issue with Mountain Lion. When you did the clean install did you use Migration Assistant to put all the data back? If so then it might have brought back the problem.

No - I manually transferred my files to my external HDD without migration assistant and transferred them back manually. Never used migration assistant.

 

[iBookG4user]

No - I manually transferred my files to my external HDD without migration assistant and transferred them back manually. Never used migration assistant.

That's good. When the lockup occurs next time check console and see what it says about the event and then post the details of the console log in here so we can get an idea of where the problem originates.

 

[JamesHP]

That's good. When the lockup occurs next time check console and see what it says about the event and then post the details of the console log in here so we can get an idea of where the problem originates.

Having looked back at the last one I have loads of these:

08/09/2012 20:05:32.000 kernel[0]: stampWait: Overflowed checking for stamp 0x10a3d7 on MAIN ring: called from 
08/09/2012 20:05:32.000 kernel[0]: timestamp = 0x10a3bf
08/09/2012 20:05:32.000 kernel[0]: ****  Debug info for *possible* hang in MAIN graphics engine  ****
08/09/2012 20:05:32.000 kernel[0]: ring head    = 0x9860ac98, wrap count = 1219
08/09/2012 20:05:32.000 kernel[0]: ring tail    = 0x0000b478
08/09/2012 20:05:32.000 kernel[0]: ring control = 0x0000f401   enabled, auto report disabled, not waiting, semaphore is waiting, length = 0x010 4KB pages
08/09/2012 20:05:32.000 kernel[0]: timestamps = 0x10a3bf
08/09/2012 20:05:32.000 kernel[0]: Semaphore register values:
08/09/2012 20:05:32.000 kernel[0]: VRSYNC: (0x12044) = 0x10a3bf
08/09/2012 20:05:32.000 kernel[0]: BRSYNC: (0x22040) = 0x0
08/09/2012 20:05:32.000 kernel[0]: RVSYNC: (0x 2040) = 0x0
08/09/2012 20:05:32.000 kernel[0]: BVSYNC: (0x22044) = 0x0
08/09/2012 20:05:32.000 kernel[0]: RBSYNC: (0x 2044) = 0x0
08/09/2012 20:05:32.000 kernel[0]: VBSYNC: (0x12040) = 0x0
08/09/2012 20:05:32.000 kernel[0]: trying to clear semaphore wait on MAIN ring
08/09/2012 20:05:32.000 kernel[0]: After attempt to clear semaphore wait = 0x0000f401 still waiting

These repeat until I force shutdown my computer and are showing debug info for "*possible* hangs" in "MAIN graphics engine." and "BLT graphics engine"

 

[iBookG4user]

Having looked back at the last one I have loads of these:

08/09/2012 20:05:32.000 kernel[0]: stampWait: Overflowed checking for stamp 0x10a3d7 on MAIN ring: called from 
08/09/2012 20:05:32.000 kernel[0]: timestamp = 0x10a3bf
08/09/2012 20:05:32.000 kernel[0]: ****  Debug info for *possible* hang in MAIN graphics engine  ****
08/09/2012 20:05:32.000 kernel[0]: ring head    = 0x9860ac98, wrap count = 1219
08/09/2012 20:05:32.000 kernel[0]: ring tail    = 0x0000b478
08/09/2012 20:05:32.000 kernel[0]: ring control = 0x0000f401   enabled, auto report disabled, not waiting, semaphore is waiting, length = 0x010 4KB pages
08/09/2012 20:05:32.000 kernel[0]: timestamps = 0x10a3bf
08/09/2012 20:05:32.000 kernel[0]: Semaphore register values:
08/09/2012 20:05:32.000 kernel[0]: VRSYNC: (0x12044) = 0x10a3bf
08/09/2012 20:05:32.000 kernel[0]: BRSYNC: (0x22040) = 0x0
08/09/2012 20:05:32.000 kernel[0]: RVSYNC: (0x 2040) = 0x0
08/09/2012 20:05:32.000 kernel[0]: BVSYNC: (0x22044) = 0x0
08/09/2012 20:05:32.000 kernel[0]: RBSYNC: (0x 2044) = 0x0
08/09/2012 20:05:32.000 kernel[0]: VBSYNC: (0x12040) = 0x0
08/09/2012 20:05:32.000 kernel[0]: trying to clear semaphore wait on MAIN ring
08/09/2012 20:05:32.000 kernel[0]: After attempt to clear semaphore wait = 0x0000f401 still waiting

These repeat until I force shutdown my computer and are showing debug info for "*possible* hangs" in "MAIN graphics engine." and "BLT graphics engine"

Do you have a program installed such as gfxcardstatus which lets you control which graphics card is in use?

 

[JamesHP]

Do you have a program installed such as gfxcardstatus which lets you control which graphics card is in use?

No, I don't. I only have an integrated graphics card, I'm on a 13" baseline MBP.