2 Replies Latest reply: Jun 10, 2013 5:12 PM by justin_gordon
need2know Level 1 Level 1 (10 points)

My Mac has been crashing for no apparent reason today.  Cursor freezes then black screen and reboots itself.  Last one was just spinning wheel of death.  At the time this happened: 1 was moving mouse across desktop - no application loaded. 2.  Browsing (newspaper website) using Safari. 3. On Twitter.  Have repaired disk permissions.

 

On looking at my log I see this the last time it happened:

 

2/03/2013 12:58:30.245 Safari[1756]: CGContextClipToRect: invalid context 0x0

12/03/2013 12:59:05.000 kernel[0]: NVDA(OpenGL): Channel timeout!

12/03/2013 12:59:11.000 kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0x8 = Fifo: Watchdog Timeout Error

12/03/2013 12:59:27.000 kernel[0]: NVDA(OpenGL): Channel timeout!

12/03/2013 12:59:35.000 kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0x8 = Fifo: Watchdog Timeout Error

12/03/2013 12:59:51.000 kernel[0]: NVDA(OpenGL): Channel timeout!

12/03/2013 12:59:59.000 kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0x8 = Fifo: Watchdog Timeout Error

12/03/2013 13:00:15.000 kernel[0]: NVDA(OpenGL): Channel timeout!

12/03/2013 13:00:23.000 kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0x8 = Fifo: Watchdog Timeout Error

12/03/2013 13:00:23.000 kernel[0]: IOHIDSystem cursor update overdue. Resending.

12/03/2013 13:00:39.000 kernel[0]: NVDA(OpenGL): Channel timeout!

12/03/2013 13:00:47.000 kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0x8 = Fifo: Watchdog Timeout Error

 

So is my video card packing up?

 

Thanks for any suggestions or help.

 

Ann


iMac, OS X Mountain Lion (10.8.2), Imac 2.93Ghz 24"
  • 1. Re: Mac Crashing three times one day
    BDAqua Level 10 Level 10 (116,480 points)

    Hi Ann, I'm wondering from this post, if possibly the Monitor or cable losing connection for an instant or such?

     

    https://forums.geforce.com/default/topic/528705/nvidia-watchdog-timer-on-apple-o s-x/

     

    Might see this too...

     

    highmac.com/how-to/fix-kernel-nvdaopengl-channel-exception/

     

    One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...

     

    PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive

     

    Reboot, test again.

     

    If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts (Users & Groups in later OSX versions)>Login Items window to see if it or something relevant is listed.

     

    Check the System Preferences>Other Row, for 3rd party Pref Panes.

     

    Also look in these if they exist, some are invisible...

     

    /private/var/run/StartupItems

     

    /Library/StartupItems

     

    /System/Library/StartupItems

     

    /System/Library/LaunchDaemons

     

    /Library/LaunchDaemons

     

    Have you blown the dust out lately?

     

    Get Temperature Monitor to see if it's heat related...

     

    http://www.macupdate.com/info.php/id/12381/temperature-monitor

  • 2. Re: Mac Crashing three times one day
    justin_gordon Level 1 Level 1 (0 points)

    I've got a very similar issue. I've posted the topic here: http://apple.stackexchange.com/questions/93618/any-advice-on-troubleshooting-ins tability-in-mountain-lion-os-x-10-8-4

     

    > NVDA(OpenGL): Channel exception! exception type = 0x1f = Fifo: MMU
    > Error Jun 10 13:14:44 JustinMbp kernel[0]: NVDA(OpenGL): Channel
    > timeout!

     

    In all cases of crashes, I can SSH to the machine, but I can't figure out anything useful to remedy the situation.

    This freeze happened when sizing the crop in Aperture. Machine had been running for probably 3 days.

    Apple support wants to me uninstall every system extension, etc. to troubleshoot. They can't seem to find anything in the logs. I find that hard to believe that this issue cannot be troubleshooted via ssh or the logs.

    Needless to say, freezing every 3 days is awful. My guess is that the issue is related to updates related to Aperture or Chrome. I'm pretty sure I've been running Chrome every time the machine has crashed. I'm also sure the machine has sometimes crashed without Aperture running.

    Any advice on how to troubleshoot?

    Is there any way to have the dual video card only use the NVidia card rather than the Intel one (when using A/C)? Could that be relevant?