Mountain Lion Screen Freeze

I just did a bit more testing. On quitting FCP X (recreating the hang), if any graphic element is moved (i.e. causes a redraw), it will hang. It always comes back to life after < 10 sec, fortunately. For instance, quitting to the desktop, and moving the arrow cursor will be fine. But, try dragging an icon and it will hang - provided you do it within 10 sec or so of quitting FCP X. There's no doubt it's some cleaning up that's done when FCP quits that will hang if any graphic element needs redrawing.

I had the same problem: https://discussions.apple.com/thread/4659996?answerId=21322029022#21322029022

Here is a temporary fix:

Disable the automatic switching of the graphic cards in System Preferences -> Energy Saver -> uncheck the automatic graphics switching

To fix it: bring your macbook to your local apple store and ask them to fix the freezing issue. If it is related to graphics, they will replace your logic board for free (of course).

They fixed the freezings on my macbook by replacing the logic board. These are the manufacturer's hardware defects and must be fixed.

Hey People!!...Do not spend time describing about your problem. The original post says "Mountain Lion Screen Freeze", then all of us understand what is happening. I think the best way in order to guide the Apple Developers to help you to solve this issue, is showing your LOG FILE when freeze occurrs. I did a couple of time this several months ago, and the new releases came to the light. I waited a couple of month but finally the v10.8.2 solved the same problem you're describing. So, posting Log Files help better than describing what you believe or think when using Apps. Think about this...

While the title of the discussion is "screen freeze", the original post talks about the screen itself not being completely frozen (the cursor etc. can be moved around) but rather the computer is completely unresponsive to mouse and keyboard operations. It quickly got of track from that original post to problems such as with GPU on macbooks. Many of us, myself included, see this problem on non laptops, where the GPU switching is not even available. The problem with logs etc. is that the only way I have to recover this is to force power off, and when I power on there is no crash report, and no information going to apple. Looking in console after the restart I can so far see no common denominators immediately before the Bootlog, so I have no meaningful information I can send. In any case, if I do get reports, how can I send these cnosole lists, logs etc. to Apple. I'd like to do so as I think otherwise they are completey unaware of this since, as I mentioned, my system is sending no information about it to apple.

The way I reproduced this annoying bug with my HD3000 on 10.7.4:

Finder: navigate to a few JPEG images or folders, switch to a different app with

Cmd+Tab. Then switch back again, and so on. It very often hangs with the switcher stuck on screen.

Its not a complete hang; user interface appears stuck but the machine can be sshed into and tasks can be performed, e.g. "sudo reboot"

As was suggested by our friendly intelligent hackintosh community, I did some testing.

Modified the AISNBFB table with just one connector in the table. Since I only need LVDS (laptop screen) and can do without HDMI, for the time being, its OK as a workaround. Will post back if I experience any more hangs.

Well, after months of putting up with the constant freezing and trying all sorts of fixes and remedies (refer to my previous posts) I have given up and decided that it is not worth having Mountain Lion on my machine any longer. The most frustrating thing is that there is nothing in the system logs to indicate a problem - it just freezes for 30-60 seconds.

Anyway, I wiped the whole mess and installed Snow Leopard a few days ago. Now running it with all the updates to 10.6.8 and so far not a freeze in sight. In fact, I forgot how good Snow Leopard is - it just works! Quick and reliable as an OS should be.

I really hope that Apple will sort this out sooner rather than later. I should not be forced to take this action just to be able to use my very expensive Macbook Pro on a daily basis.

I did a bit of more serious detective work and thought I had found two rogue processes from years back that I had no idea were still in my system (the drawbacks to alays migrating when rebuilding systems), and indeed I went 4 days without a freeze (a miracle), but had it happen again today. This time, however, I seemed to get a potentially meaningful crash log (a CpuResource spin report for iCloud helper). So what I want to know is, as I have read that the apple technical people don't access these groups, and as it doen't appear that any of the crash logs after these weird screen freeze forced restarts are getting sent to apple, is there an official method for getting these logs to apple so they can hopefully use the information to fix whatever it is that is annoying the beejaysus out of us all?

Hallelujah!!! The latest Apple update seems to have fixed this problem on my rMBP. Thank you Apple!!!

This just happened to me for the first time today. 2012 Mac mini, i7 2.6 GHz, 16 GB RAM, Intel HD 4000 graphics running OS X 10.8.3. I was playing Minecraft and all of a sudden the game froze on me. At first I thought it was just the game (I run a lot of mods and thought maybe it was some kind of mod conflict) but then noticed that al+tab, mission control, etc. didn't work, etc.

I was still able to log in to the machine over ssh from one of my other machines, and when I checked the console log, I saw the messages "stampWait: Overflowed checking for stamp 0x9b4cefa on MAIN ring" and "gpu hang trying restart gpu main ring is not waiting on an event"

Funny thing is, this is the first time this has happened to me, out of all the time I've owned this machine, which I normally work pretty hard (FCPX, video encoding, playing lots of 1080p content, etc.)

Had my first (and now at least 12x) screen freezes today. iMac 27" / 3.4ghz / 8gb / Geforce GTC 680MX 2048 / 10.8.3 Mountain Lion up-to-date

In addition to the entire screen freezing (mouse still moves, cycling between pointer, beachball and mickeymouse glove) There is a screen tearing phenomenom. Glitchy text. Pixelation flickering.

Its most noticable on the grey log-in screen, where reveals of a pixel grid are visible.

Screenshots:

http://imgur.com/a/30xv9

Please help! Screen has frozen 3x just trying to post this!!!

This solved my problem

Go to Finder "Go" menu hold the option key and choose Library. Then go to Preferences folder and trash these files:

com.apple.finder.plist

com.apple.sidebarlists.plist

Restart with hold shift key

restart again

My screen has been freezing too,

Early 2011 MacBook Pro 2.3 GHz Inter Core i5, 16 GB RAM, SSD 512 GB, External Monitor Connected. I use chrome all the time.

below is the log, I filtered it down,

Apr 12 07:30:10 Buggy kernel[0]: stampWait: Overflowed checking for stamp 0x0 on MAIN ring: called from

Apr 12 07:30:10 Buggy kernel[0]: timestamp = 0x8f523974

Apr 12 07:30:10 Buggy kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

Apr 12 07:30:10 Buggy kernel[0]: ring head = 0x36e06988, wrap count = 439

Apr 12 07:30:10 Buggy kernel[0]: ring tail = 0x00006988

Apr 12 07:30:10 Buggy kernel[0]: ring control = 0x0000f001 enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

Apr 12 07:30:10 Buggy kernel[0]: timestamps = 0x8f523974

Apr 12 07:30:10 Buggy kernel[0]: Semaphore register values:

Apr 12 07:30:10 Buggy kernel[0]: VRSYNC: (0x12044) = 0x8f523974

Apr 12 07:30:10 Buggy kernel[0]: BRSYNC: (0x22040) = 0x0

Apr 12 07:30:10 Buggy kernel[0]: RVSYNC: (0x 2040) = 0x0

Apr 12 07:30:10 Buggy kernel[0]: BVSYNC: (0x22044) = 0x0

Apr 12 07:30:10 Buggy kernel[0]: RBSYNC: (0x 2044) = 0x0

Apr 12 07:30:10 Buggy kernel[0]: VBSYNC: (0x12040) = 0x0

Apr 12 07:30:15 Buggy kernel[0]: stampWait: Overflowed checking for stamp 0x207d on MAIN ring: called from

Apr 12 07:30:15 Buggy kernel[0]: timestamp = 0x8f5239fd

Apr 12 07:30:15 Buggy kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

Apr 12 07:30:15 Buggy kernel[0]: ring head = 0x36e0a1d0, wrap count = 439

Apr 12 07:30:15 Buggy kernel[0]: ring tail = 0x0000a1d0

Apr 12 07:30:15 Buggy kernel[0]: ring control = 0x0000f001 enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

Apr 12 07:30:15 Buggy kernel[0]: timestamps = 0x8f5239fd

Apr 12 07:30:15 Buggy kernel[0]: Semaphore register values:

Apr 12 07:30:15 Buggy kernel[0]: VRSYNC: (0x12044) = 0x8f5239fd

Apr 12 07:30:15 Buggy kernel[0]: BRSYNC: (0x22040) = 0x0

Apr 12 07:30:15 Buggy kernel[0]: RVSYNC: (0x 2040) = 0x0

Apr 12 07:30:15 Buggy kernel[0]: BVSYNC: (0x22044) = 0x0

Apr 12 07:30:15 Buggy kernel[0]: RBSYNC: (0x 2044) = 0x0

Apr 12 07:30:15 Buggy kernel[0]: VBSYNC: (0x12040) = 0x0

Apr 12 07:30:21 Buggy kernel[0]: stampWait: Overflowed checking for stamp 0x0 on MAIN ring: called from

Apr 12 07:30:21 Buggy kernel[0]: timestamp = 0x8f523a43

Apr 12 07:30:21 Buggy kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

Apr 12 07:30:21 Buggy kernel[0]: ring head = 0x36e0bcd0, wrap count = 439

Apr 12 07:30:21 Buggy kernel[0]: ring tail = 0x0000bcd0

Apr 12 07:30:21 Buggy kernel[0]: ring control = 0x0000f001 enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

Apr 12 07:30:21 Buggy kernel[0]: timestamps = 0x8f523a43

Apr 12 07:30:21 Buggy kernel[0]: Semaphore register values:

Apr 12 07:30:21 Buggy kernel[0]: VRSYNC: (0x12044) = 0x8f523a43

Apr 12 07:30:21 Buggy kernel[0]: BRSYNC: (0x22040) = 0x0

Apr 12 07:30:21 Buggy kernel[0]: RVSYNC: (0x 2040) = 0x0

Apr 12 07:30:21 Buggy kernel[0]: BVSYNC: (0x22044) = 0x0

Apr 12 07:30:21 Buggy kernel[0]: RBSYNC: (0x 2044) = 0x0

Apr 12 07:30:21 Buggy kernel[0]: VBSYNC: (0x12040) = 0x0

Apr 12 07:30:26 Buggy kernel[0]: stampWait: Overflowed checking for stamp 0x0 on MAIN ring: called from

Apr 12 07:30:26 Buggy kernel[0]: timestamp = 0x8f523a43

Apr 12 07:30:26 Buggy kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

Apr 12 07:30:26 Buggy kernel[0]: ring head = 0x36e0bcd0, wrap count = 439

Apr 12 07:30:26 Buggy kernel[0]: ring tail = 0x0000bcd0

Apr 12 07:30:26 Buggy kernel[0]: ring control = 0x0000f001 enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

Apr 12 07:30:26 Buggy kernel[0]: timestamps = 0x8f523a43

Apr 12 07:30:26 Buggy kernel[0]: Semaphore register values:

Apr 12 07:30:26 Buggy kernel[0]: VRSYNC: (0x12044) = 0x8f523a43

Apr 12 07:30:26 Buggy kernel[0]: BRSYNC: (0x22040) = 0x0

Apr 12 07:30:26 Buggy kernel[0]: RVSYNC: (0x 2040) = 0x0

Apr 12 07:30:26 Buggy kernel[0]: BVSYNC: (0x22044) = 0x0

Apr 12 07:30:26 Buggy kernel[0]: RBSYNC: (0x 2044) = 0x0

Apr 12 07:30:26 Buggy kernel[0]: VBSYNC: (0x12040) = 0x0

Apr 12 07:30:31 Buggy kernel[0]: stampWait: Overflowed checking for stamp 0x0 on MAIN ring: called from

Apr 12 07:30:31 Buggy kernel[0]: timestamp = 0x8f523a43

Apr 12 07:30:31 Buggy kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

Apr 12 07:30:31 Buggy kernel[0]: ring head = 0x36e0bcd0, wrap count = 439

Apr 12 07:30:31 Buggy kernel[0]: ring tail = 0x0000bcd0

Apr 12 07:30:31 Buggy kernel[0]: ring control = 0x0000f001 enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

Apr 12 07:30:31 Buggy kernel[0]: timestamps = 0x8f523a43

Apr 12 07:30:31 Buggy kernel[0]: Semaphore register values:

Apr 12 07:30:31 Buggy kernel[0]: VRSYNC: (0x12044) = 0x8f523a43

Apr 12 07:30:31 Buggy kernel[0]: BRSYNC: (0x22040) = 0x0

Apr 12 07:30:31 Buggy kernel[0]: RVSYNC: (0x 2040) = 0x0

Apr 12 07:30:31 Buggy kernel[0]: BVSYNC: (0x22044) = 0x0

Apr 12 07:30:31 Buggy kernel[0]: RBSYNC: (0x 2044) = 0x0

Apr 12 07:30:31 Buggy kernel[0]: VBSYNC: (0x12040) = 0x0

Apr 12 07:30:35 Buggy kernel[0]: stampWait: Overflowed checking for stamp 0x0 on MAIN ring: called from

Apr 12 07:30:35 Buggy kernel[0]: timestamp = 0x8f523a43

Apr 12 07:30:35 Buggy kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

Apr 12 07:30:35 Buggy kernel[0]: ring head = 0x36e0bcd0, wrap count = 439

Apr 12 07:30:35 Buggy kernel[0]: ring tail = 0x0000bcd0

Apr 12 07:30:35 Buggy kernel[0]: ring control = 0x0000f001 enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

Apr 12 07:30:35 Buggy kernel[0]: timestamps = 0x8f523a43

Apr 12 07:30:35 Buggy kernel[0]: Semaphore register values:

Apr 12 07:30:35 Buggy kernel[0]: VRSYNC: (0x12044) = 0x8f523a43

Apr 12 07:30:35 Buggy kernel[0]: BRSYNC: (0x22040) = 0x0

Apr 12 07:30:35 Buggy kernel[0]: RVSYNC: (0x 2040) = 0x0

Apr 12 07:30:35 Buggy kernel[0]: BVSYNC: (0x22044) = 0x0

Apr 12 07:30:35 Buggy kernel[0]: RBSYNC: (0x 2044) = 0x0

Apr 12 07:30:35 Buggy kernel[0]: VBSYNC: (0x12040) = 0x0

Apr 12 07:30:40 Buggy kernel[0]: stampWait: Overflowed checking for stamp 0x716e31c on MAIN ring: called from

Apr 12 07:30:40 Buggy kernel[0]: timestamp = 0x8f523a6b

Apr 12 07:30:40 Buggy kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

Apr 12 07:30:40 Buggy kernel[0]: ring head = 0x36e0c9d0, wrap count = 439

Apr 12 07:30:40 Buggy kernel[0]: ring tail = 0x0000c9d0

Apr 12 07:30:40 Buggy kernel[0]: ring control = 0x0000f001 enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

Apr 12 07:30:40 Buggy kernel[0]: timestamps = 0x8f523a6b

Apr 12 07:30:40 Buggy kernel[0]: Semaphore register values:

Apr 12 07:30:40 Buggy kernel[0]: VRSYNC: (0x12044) = 0x8f523a6b

Apr 12 07:30:40 Buggy kernel[0]: BRSYNC: (0x22040) = 0x0

Apr 12 07:30:40 Buggy kernel[0]: RVSYNC: (0x 2040) = 0x0

Apr 12 07:30:40 Buggy kernel[0]: BVSYNC: (0x22044) = 0x0

Apr 12 07:30:40 Buggy kernel[0]: RBSYNC: (0x 2044) = 0x0

Apr 12 07:30:40 Buggy kernel[0]: VBSYNC: (0x12040) = 0x0

Apr 12 07:30:46 Buggy kernel[0]: stampWait: Overflowed checking for stamp 0x55cb on MAIN ring: called from

Apr 12 07:30:46 Buggy kernel[0]: timestamp = 0x8f523ac8

Apr 12 07:30:46 Buggy kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

Apr 12 07:30:46 Buggy kernel[0]: ring head = 0x36e0e5c8, wrap count = 439

Apr 12 07:30:46 Buggy kernel[0]: ring tail = 0x0000e5c8

Apr 12 07:30:46 Buggy kernel[0]: ring control = 0x0000f001 enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

Apr 12 07:30:46 Buggy kernel[0]: timestamps = 0x8f523ac8

Apr 12 07:30:46 Buggy kernel[0]: Semaphore register values:

Apr 12 07:30:46 Buggy kernel[0]: VRSYNC: (0x12044) = 0x8f523ac8

Apr 12 07:30:46 Buggy kernel[0]: BRSYNC: (0x22040) = 0x0

Apr 12 07:30:46 Buggy kernel[0]: RVSYNC: (0x 2040) = 0x0

Apr 12 07:30:46 Buggy kernel[0]: BVSYNC: (0x22044) = 0x0

Apr 12 07:30:46 Buggy kernel[0]: RBSYNC: (0x 2044) = 0x0

Apr 12 07:30:46 Buggy kernel[0]: VBSYNC: (0x12040) = 0x0

rm ~/Library/Preferences/com.apple.finder.*

rm ~/Library/Preferences/com.apple.sidebarlists.*

killall Finder

Inspired by a prior post, this seems to have fixed it for me. I didn't have to restart.

Update: no go. Still getting the issue.

I was thinking it was a hardware issue (faulty RAM maybe) so I ran a complete Apple Hardware Test (restart mac while pressing D) and everything came back clean...

I get this issue every few days or so ever since I started using this 2012 MacMini. It is a media server connected to my TV via HDMI. It only runs Plex (0.9.5.4) and usually happens when I've finished watching a show and start to watch another. It is not consistent with specific shows. I can watch the next show just fine after a reboot.

The GUI locks up completely, can't connect to it via Screen Sharing, but I able to SSH into it just fine. I ran top and nothing was using a lot of memory or CPU. In fact, top itself was the highest usage.

It doesn't have the option to disable graphic switching and the other suggestions listed in this thread didn't help either.

The following appeared in the system.log

The last 2 lines repeated every 2 seconds for about 15 minutes until I rebooted it.

May 10 23:31:18 plex kernel[0]: stampWait: Overflowed checking for stamp 0x0 on MAIN ring: called from

May 10 23:31:18 plex kernel[0]: timestamp = 0x80020992

May 10 23:31:18 plex kernel[0]: **** Debug info for *possible* hang in MAIN graphics engine ****

May 10 23:31:18 plex kernel[0]: ring head = 0xf1602f28, wrap count = 1931

May 10 23:31:18 plex kernel[0]: ring tail = 0x00002f28

May 10 23:31:18 plex kernel[0]: ring control = 0x0000f001 enabled, auto report disabled, not waiting, semaphore not waiting, length = 0x010 4KB pages

May 10 23:31:18 plex kernel[0]: timestamps = 0x80020992

May 10 23:31:18 plex kernel[0]: Semaphore register values:

May 10 23:31:18 plex kernel[0]: VRSYNC: (0x12044) = 0x80020992

May 10 23:31:18 plex kernel[0]: BRSYNC: (0x22040) = 0x0

May 10 23:31:18 plex kernel[0]: RVSYNC: (0x 2040) = 0x0

May 10 23:31:18 plex kernel[0]: BVSYNC: (0x22044) = 0x0

May 10 23:31:18 plex kernel[0]: RBSYNC: (0x 2044) = 0x0

May 10 23:31:18 plex kernel[0]: VBSYNC: (0x12040) = 0x0

May 10 23:31:19 plex.local Plex[174]: AVF error: Gen7IntelGVAQueryAVDCommandStatus, TimeOut. Resetting.

May 10 23:31:31 plex kernel[0]: stampWait: Overflowed checking for stamp 0x338811 on MEDIA ring: called from

May 10 23:31:31 plex kernel[0]: timestamp = 0x338810

Here are the system specs

Diagnostics:

Power On Self-Test:

Last Run: 5/10/13 11:47 PM

Result: Passed

Graphics/Displays:

Intel HD Graphics 4000:

Chipset Model: Intel HD Graphics 4000

Type: GPU

Bus: Built-In

VRAM (Total): 512 MB

Vendor: Intel (0x8086)

Device ID: 0x0166

Revision ID: 0x0009

Hardware:

Hardware Overview:

Model Name: Mac mini

Model Identifier: Macmini6,1

Processor Name: Intel Core i5

Processor Speed: 2.5 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache (per Core): 256 KB

L3 Cache: 3 MB

Memory: 4 GB

Boot ROM Version: MM61.0106.B03

SMC Version (system): 2.7f0

Memory

Memory Slots:

ECC: Disabled

BANK 0/DIMM0:

Size: 2 GB

Type: DDR3

Speed: 1600 MHz

Status: OK

Manufacturer: 0x02FE

BANK 1/DIMM0:

Size: 2 GB

Type: DDR3

Speed: 1600 MHz

Status: OK

Manufacturer: 0x02FE

Software:

System Software Overview:

System Version: OS X 10.8.3 (12D78)

Kernel Version: Darwin 12.3.0