Graphics cards causing crash?

Discussion in 'Mac Pro' started by pcmxa, Dec 25, 2011.

  1. pcmxa, Dec 25, 2011
    Last edited: Dec 25, 2011

    pcmxa macrumors regular


    Apr 9, 2011

    I have talked with Apple Support about this and they elevated it to the engineers, but I haven't heard back for 3 weeks now so thought I would come here with it.

    I am getting crashes. What happens is the system will suddenly flicker and show the login screen. When I log in, any unsaved changes are lost. Thankfully I am good about saving (or use programs where saving is obsolete), so this isn't a major deal, but it is annoying.

    It seems like a similar problem is happening in Macbook Pros she the graphics card is switching and that got me to thinking. Could my two video cards be causing this? Has anyone on a Mac Pro had something similar happen to them> I know I can always pull one of the video cards and see if the problem goes away, but it is very intermittent and sometimes doesn't happen for a week or so, and I can't see a pattern to try and trigger it.

    Also I was wondering if there is any performance gain in OS x 10.7.2 with having two video cards (to drive two monitors). I just put in two because I had the second one already when I bought the computer.

    Thanks for any thoughts. System and crash info below.

    Process:         WindowServer [176]
    Path:            /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/WindowServer
    Identifier:      WindowServer
    Version:         ??? (???)
    Code Type:       X86-64 (Native)
    Parent Process:  launchd [1]
    Date/Time:       2011-12-20 17:33:14.434 -0700
    OS Version:      Mac OS X 10.7.2 (11C74)
    Report Version:  9
    Anonymous UUID:                      E662F37F-81A4-4B57-B862-97855A29D57C
    Crashed Thread:  0  Dispatch queue:
    Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
    Exception Codes: KERN_INVALID_ADDRESS at 0x00007fe7bb107498
    VM Regions Near 0x7fe7bb107498:
        MALLOC_TINY            00007fd7be800000-00007fd7bed00000 [ 5120K] rw-/rwx SM=PRV  
        STACK GUARD            00007fff5e251000-00007fff61a51000 [ 56.0M] ---/rwx SM=NUL  stack guard for thread 0
    Application Specific Information:
    objc[176]: garbage collection is OFF
    Thread 0 Crashed:: Dispatch queue:
    0        	0x00007fff8906848d magazine_dealloc + 30
    1        	0x00007fff890683ab regionFinalize + 23
    2      	0x00007fff88788256 CFRelease + 502
    3        	0x00007fff89067226 CGSReleaseRegion + 77
    4        	0x00007fff89080a4d opaqueShapeAboveForWindow + 397
    5        	0x00007fff89094963 CGXGetScreenVisibleContentShapeForWindow + 59
    6        	0x00007fff891214e3 _CGXInvalidateWindowRegion + 53
    7        	0x00007fff8911b741 CGXFlushWindowList + 599
    8        	0x00007fff8911b4e3 CGXFlushWindow + 33
    9        	0x00007fff8911b467 _CGXFlushRegionInline + 188
    10        	0x00007fff8911b35a _XFlushRegionInline + 190
    11        	0x00007fff8909a9e9 CGXServices_server + 148
    12        	0x00007fff8909a944 __connectionHandler_block_invoke_1 + 20
    13        	0x00007fff89097374 CGSHandleMessage + 149
    14        	0x00007fff8909a8ed connectionHandler + 137
    15        	0x00007fff8908fed1 CGXPostPortData + 162
    16        	0x00007fff8908fd02 CGXRunOneServerPass + 498
    17        	0x00007fff8908d757 CGXRunOneServicesPass + 423
    18        	0x00007fff89096f4f CGXServerLoop + 165
    19        	0x00007fff8944174e CGXServer + 1069
    20  WindowServer                  	0x0000000102651f31 main + 9
    21  WindowServer                  	0x0000000102651f20 start + 52
  2. ActionableMango macrumors G3


    Sep 21, 2010
    Basic rule of troubleshooting says to take one graphics card out and see if the problem occurs. If it does, then switch cards and see if the problem occurs.

    Doing so may present the answer to you.
  3. pcmxa thread starter macrumors regular


    Apr 9, 2011
    Thanks, that is what I decided to try. So I just have the one in now and if it doesn't crash in the next week or so, I will switch it out. Mostly just curious if anyone else was having this issue.

    Thanks again.


Share This Page