Q: Mac Pro keeps logging out since El Capitan

Having same problem.  El Capitan, 2009 Mac Pro.  None of the fixes here worked for me.

This is not a fix, but as some other people did, I've removed the GT120 cards to use only one GTX 650 Ti Boost in my Mac Pro 4.1, with my 2 Samsung (sorry!) displays => no problem at all, everything works perfect. Of course with no boot screen. But the more I use El Capitan, the more I like it, as my (obsolete…) Mac seems to work faster than ever :-)

Same here!

I did installed the 10.11.2 Beta 2 (15C31f) (Developer)  on my MacPro 2009 4,1 upgraded-> 5,1; GT120+GTX650.

With my test case (see my previous post) by clicking the menus in either display, I finally had a logout.

So this new beta do not solve our issue. (nor did Beta 1 as seemed to mention dugboldt)

I had the same experience on November 6 with the most recent version of their beta. I reported this via Feedback Assistant to their beta team, then disconnected the second display and the problem disappeared, which seems to confirm what we've observed ... having more than one display is the problem.

I have updated to the 10/29/15 Nvidia Driver Release (346.03.03f02) and Disabled the Different Displays have different Space sin Mission Control and am still experiencing the same issue. Early 2009 Mac Pro with Nvidia 120 and Radeon HD 5770.  

I was really hoping that the next betas would resolve this issue

Have the same problem as all. 2009 2x GT120 and 3x 24" monitors. Was thinking if I buy a GTX 680 I could run all 3 monitors on one card to side step this mess and get on with my work. Before doing so does anyone have this logout issue using 2 cards and neither are a GT120? Does anyone else run 3 monitors on one card and do you get acceptable performance? Cheers

Skewif,

I have a GTX 680 and my machine randomly reset (rebooted) under El Capitan. I had to go back to Yosemite. This was running either 2 or 3 monitors.

Drat! That plan is scuppered. Thanks for the info.  When working does it cope well with running 3 monitors? Is it the only card fitted? I did not realise this problem effected single graphics cards, I thought it was only when more than one is in use.

I had 2 GT 120 with 4 displays, same issue like the rest logoff every 10 to 30 sec.

Only thing that has worked for me so far no logouts, crashes or any problems in over a month but no boot screen:

I installed the NVS 510 card has 4 Mini DisplayPort 1.2, Using:

Philips FTV 48" TV mini dp to hdmi cable

Acer H236HL Apple MiniDP to DVI Adapter X 2

VGA DisplaySamsung 24" Apple MiniDP to VGA Adapter, but orders 2nd mini dp to hdmi cable.

Hi Skewif,

Yes performance was reasonable (although I did tend to notice a little slow down on occasion). Totally usable though.

And yes, it is the only card in the machine (upgraded after my second ATI card died, then had one of these 680s die on me too).

I haven't had much luck with graphics cards in Mac Pros. In fact, now that I think about it, killing 5 graphics cards (including the original intel mac pro) in 8 years might suggest that while it works, the cards don't appreciate lots of monitors and being driven hard. ;-)

I would hope everyone who is experiencing this logout/WindowServer Crash is spending the time to get on the phone and complain to Apple Support that you and many others are having this problem. And not just relying on this thread to get it corrected.  We need a strong voice to get this fixed.

the following is just a snip of the crash report in the console.

Time Awake Since Boot: 8200 seconds

System Integrity Protection: enabled

VM Regions Near 0x17f9d2100:

-->

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread

0   com.apple.GeForceTeslaGLDriver    0x00000001644ad51d 0x164197000 + 3237149

1   com.apple.GeForceTeslaGLDriver    0x00000001644ad206 0x164197000 + 3236358

Mac Pro (Early 2009)

El Capitan 10.11.1 (15B42)

2 x 24" Apple LED Cinema Displays (1920 x 1200)

ATI Radeon HD 4870 512 MB graphics

NVIDIA GeForce GT 120 512 MB graphics

After upgrading to El Capitan I was getting logged off every few minutes.

My system has been stable for the last hour after installing this nvidia driver and rebooting.

http://www.nvidia.com/download/driverResults.aspx/93555/en-us

Hope this helps someone!

Hi,

I asked Nvidia about it and below is answer:

Your case is being escalated to our Level 2 Tech Support group. The Level 2 agents will review the case notes and may attempt to recreate your issue or find a workaround solution if possible. As this process may take some time we ask that you be patient and a Level 2 tech will contact you as soon they can to help resolve your issue.

So, nothing to say... I hope they won't ignore us too long...

it's not working for me