Genetixa
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Q: 10.9.2 Reboot loop no Displayport working

Installed 10.9.2 last night, had to revert back to 10.9. Apparently if there is a display connected to the Displayport the system kernel panic. I have 2 display and if I unplug the Led CinemaDisplay from the Displayport it will boot fine on the Dvi connected monitor. Was working like a charm on 10.9.1.

 

Mac Pro 5.1 + Radeon HD 7980

 

Thanks

Mac Pro, OS X Mavericks (10.9.2), Reboot loop, kernel panic

Posted on Feb 26, 2014 3:04 PM

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Q: 10.9.2 Reboot loop no Displayport working

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  • by Tomfoolery82,

    Tomfoolery82 Tomfoolery82 Mar 2, 2014 2:47 AM in response to Genetixa
    Level 1 (0 points)
    Mar 2, 2014 2:47 AM in response to Genetixa

    Mac Pro 5,1 HD 7850.  Same problem with 10.9.2. DVI port, HDMI port works.  Both Mini DisplayPorts do not. If you plug in a MDP it crashes with kernel panic immediately.  I contacted Apple and engineers are looking into it. The HD 7xxx works, it is just the Mini DisplayPort causing the problem. Rolling back the AMD7000Contoller, AMDFramebuffer, AMD Support, Plus 3 other related kext.  (IOPCI....).  Did not fix. Does anybody know of the name of the kext the controls the Mini DisplayPort?  

  • by Greenhoe,

    Greenhoe Greenhoe Mar 19, 2014 1:15 PM in response to Tomfoolery82
    Level 1 (0 points)
    Mar 19, 2014 1:15 PM in response to Tomfoolery82

    I am having the same issue, I have a 7980 in my 4,1 Mac Pro and it just keeps rebooting.  I have two 27 ACDs hooked up via mini display port. I at first thought it was my hard drive but once I took out my graphics card it booted right up.

     

    I swapped out the 7980 with my older 6870 and am running the 2 ACDs off the two mini displayports and everything is working fine so it appears to be a issue with the Radeon HD 7980 card MDP drivers.