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Old 03-15-2012, 08:52 PM   #1
arxanas
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Join Date: Mar 2012
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[10.7.3] All programs randomly hang until screen update.

I'm running OS X 10.7.3 and I'm having a problem with these symptoms:
  • Occasionally, all programs will hang and the cursor will become the spinning rainbow wheel of death.
  • Events sent to programs during a hang appear to be queued until the end of the hang (for example, keys being typed will suddenly happen all at once).
  • The cursor still moves.
  • Updating the screen by either
    1. pressing an F-key that causes a "slider" feedback pop-up, or
    2. using a multi-touch gesture that affects the screen that isn't scrolling
    will unhang the computer.
  • Some updates to the screen that are not caused directly by my input (for example, Activity Monitor updating the program list) still work, while others (like a YouTube video) do not. However, the audio has never hung.
  • The current user does not affect whether or not programs hang.
  • Hangs sometimes occur at the login screen (at which multitouch gestures don't work, so F-keys have to be used). I don't remember whether or not a hang has occurred before logging in.
  • The process `WindowServer` appears to increase not insignificantly in CPU usage during a hang.
  • One sample of `WindowServer` during a hang resulted in calls to `mach_msg_trap` in 4 different threads each taking a good deal of time. (Some of them, however, simply take up the entire sample time, which is probably expected behavior.) I have the sample, but I'm not sure how to include it pasting it directly into the post, as there doesn't appear to be an attachment option.

That's all the information I have, and I don't know what to make of it. Can anyone shed some light on this?
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Old 03-15-2012, 09:29 PM   #2
hayne
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You forgot to mention what model of Mac you have.
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hayne.net/macosx.html
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Old 03-15-2012, 10:47 PM   #3
arxanas
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Model identifier `MacBookPro8,2`("MacBook Pro Core i7 2.2 15" Late 2011"), 2.5 GHz quad-core i7, 8GB of RAM, AMD Radeon HD 6770M.
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Old 03-16-2012, 08:26 AM   #4
gsahli
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Take it to the Apple Store - even if just out of warranty.

In the meantime, you can try generic troubleshooting:

Try a Safe Boot - does it still do the random hangs?
http://support.apple.com/kb/HT1455
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