Paul Hodson3
Level 1 (5 points)

Q: Mac Pro keeps logging out since El Capitan

Upgraded my Mac Pro to El Capitan, all went well. I logged in, then logged into iCloud and that also went well. But then it crashed with a kernel panic, restarted OK.

It now is running OK but after a few minutes it will log me off and back to the password prompt. Very frustrating and not able to work with it in such very short windows of time.

 

Anybody else seeing this?

 

Paul.

Mac Pro, OS X El Capitan (10.11)

Posted on Oct 1, 2015 4:29 AM

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Paul Hodson3

Q: Mac Pro keeps logging out since El Capitan

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  • by deansatch,

    deansatch deansatch Oct 5, 2015 5:10 AM in response to Jeremias70
    Level 1 (0 points)
    Oct 5, 2015 5:10 AM in response to Jeremias70

    That was the first thing I tried. Made no difference at all

  • by jjrodger,

    jjrodger jjrodger Oct 5, 2015 5:10 AM in response to Jeremias70
    Level 1 (5 points)
    Oct 5, 2015 5:10 AM in response to Jeremias70

    The updated driver does not solve the problem: see above.

     

    It appears that the problem is not confined to the NVIDIA GeForce 120 GT card but occurs whenever multiple video cards (of any type) are used to supply multiple monitors.

  • by LookToWindward,

    LookToWindward LookToWindward Oct 5, 2015 6:49 AM in response to Jeremias70
    Level 1 (9 points)
    Mac OS X
    Oct 5, 2015 6:49 AM in response to Jeremias70

    This seemed to solve my problem, at least it hasn't happened since I installed the update, so fingers Xed!

     

    Thanks a lot

    Dave

  • by Neliger,

    Neliger Neliger Oct 5, 2015 7:28 AM in response to Paul Hodson3
    Level 1 (0 points)
    Oct 5, 2015 7:28 AM in response to Paul Hodson3

    I had an entire working day without crash by not launching FireFox that I use for playing YouTube vidéo.

     

    Hope a quick fix for this problem.

     

    (3 GT120 cards, 6 screens)

  • by LookToWindward,

    LookToWindward LookToWindward Oct 5, 2015 7:35 AM in response to Neliger
    Level 1 (9 points)
    Mac OS X
    Oct 5, 2015 7:35 AM in response to Neliger

    Before I installed the Driver Update, I was using the FireFox too and I can't say for sure if FireFox was always running when the crash occurred. Since installed the update, I've been using FireFox and haven't had any crashes up to now....... Time will tell I for sure I suppose.

  • by vk_1,

    vk_1 vk_1 Oct 5, 2015 7:35 AM in response to vk_1
    Level 1 (0 points)
    Oct 5, 2015 7:35 AM in response to vk_1

    I'm using a single (external) monitor without MBA display and I had no problem since closing the MBA display - so that's the workaround.

    The problem seems to pop up when using 2 or more displays. I have ONLY 1 integrated GPU, Macbook Air doesn't have dedicated GPU.

  • by actionmarker,

    actionmarker actionmarker Oct 5, 2015 8:06 AM in response to Paul Hodson3
    Level 4 (1,901 points)
    Mac OS X
    Oct 5, 2015 8:06 AM in response to Paul Hodson3

    Deleted

  • by hotburnow,

    hotburnow hotburnow Oct 5, 2015 12:21 PM in response to Paul Hodson3
    Level 1 (0 points)
    Oct 5, 2015 12:21 PM in response to Paul Hodson3

    FWIW, I had a headless Macbook Pro (dead monitor) with this problem after installing El Capitan.  I couldn't log in without the windowserver crashing.  Solution was to delete all ~/Library/Preferences at the command line via ssh;    I tried just deleting the spaces and desktop plist files but that didn't work.  So I don't know the specific culprit, other than Apple for shipping a borked OS update.

  • by jeepster33,

    jeepster33 jeepster33 Oct 5, 2015 5:25 PM in response to Paul Hodson3
    Level 1 (0 points)
    Oct 5, 2015 5:25 PM in response to Paul Hodson3

    I have a 2009 Mac Pro with two GT120 cards.  I left both cards in but now I am running both displays off one card and that has fixed the issue for now ( so far ).  Thanks for all the posts on this issue.

  • by Stewart Mungo,

    Stewart Mungo Stewart Mungo Oct 5, 2015 5:32 PM in response to Paul Hodson3
    Level 1 (0 points)
    Oct 5, 2015 5:32 PM in response to Paul Hodson3

    i have had a nightmare with this update too.

  • by iWorkToGolf,

    iWorkToGolf iWorkToGolf Oct 5, 2015 6:25 PM in response to Paul Hodson3
    Level 1 (0 points)
    Oct 5, 2015 6:25 PM in response to Paul Hodson3

    It seems this thread is getting a little diluted.  I've also not seen any confirmed fixes for the root issue.  These are the scenarios that I can see from this thread.  If someone else has more information, or wants to add on, please feel free.

     

    Issue:

     

    • Multiple GPU's and Multiple Monitors used in tandem cause the user to be 'force logged out' by means of a kernel panic.
      • The GPU's themselves are not make/model specific.
      • The GPU's have to be in use, as having a second GPU installed and unused does not affect affect anything.
    • Multiple monitors on a single GPU does not cause the issue.
    • Using a second GPU as a CUDA processor still causes the issue (unconfirmed).
    • Isolated issue with Mac Pro 2009 and 2010 models (I have not seen any other reported occurrences in this thread).

     

    Bandaids:

     

    • Turn off "Different Displays have Separate Spaces"
      • Worked for some?  - Did not work for me
      • Only delays the logout, but does not fix the issue completely - Reported on this thread
    • Only use 1 graphics card
      • While this does fix the issue, it is not ideal for many of us that use graphics intensive programs with multiple monitors
      • Terrible solution for those that use more than two monitors (with caveats for pro/top end cards)
    • Install the Nvidia Web Driver
      • Worked for some? - Did not work for me (although did improve performance of my PC GTX 760 while on a single monitor)
      • Problem persists with 2 GPU and 2 Monitors.
    • Only use 1 monitor
      • Anyone that has used two or more monitors knows...

  • by Chris Vreeland,

    Chris Vreeland Chris Vreeland Oct 5, 2015 7:13 PM in response to Paul Hodson3
    Level 1 (115 points)
    Oct 5, 2015 7:13 PM in response to Paul Hodson3

    Same problem here:

    Mac pro 2008 8 core 3.0 ghz

     

    1 24 inch cinema display attached via MDP to GT120

    1 20 inch Cinema Display attached via DVI to GeForce 8800 GT

     

    It is absolutely reproducible when I launch Lightroom. Before "upgrading" to 10.11 I was using 10.9.5 & had no problems with Lightroom using both displays. You can set up a primary/secondary display in Lightroom, I'm guessing this is what is causing the crash.

     

    Also logs me out at other random times, like when I was trying to fill out a bug report. :-/

     

    Updated drivers & CUDA support, no difference.

  • by Chris Vreeland,

    Chris Vreeland Chris Vreeland Oct 5, 2015 7:31 PM in response to Chris Vreeland
    Level 1 (115 points)
    Oct 5, 2015 7:31 PM in response to Chris Vreeland

    Lightroom will launch & no dump out to the login window using only the GT 120. Wish I could use one the 8800 GT but I'd need the MDP adaptor, with is really expensive.

     

    The problem is definitely isolated to using 2 displayed, each on its own video card, for me.

  • by lllaass,

    lllaass lllaass Oct 6, 2015 1:20 AM in response to iWorkToGolf
    Level 10 (190,382 points)
    Apple Watch
    Oct 6, 2015 1:20 AM in response to iWorkToGolf

    - I have problem with 2009 MP with GT 120 and PC 5770 if one monitor is connected to each card.

    - With to to one card no problem.

    - With two monitors to one card I can use the GPUs on both cards for calculations without problems

  • by Neliger,

    Neliger Neliger Oct 6, 2015 1:43 AM in response to Paul Hodson3
    Level 1 (0 points)
    Oct 6, 2015 1:43 AM in response to Paul Hodson3

    Be careful : I've noticed that after a "back to login screen", TimeMachine don't backup anymore until I relaunch it.

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