p3nzancef1ier Posted May 3, 2016 Share Posted May 3, 2016 @Dschijn Good afternoon! I have currently have a GTX 960 and MBPR 2014 GT750m running using reFIND. Until recently I have had no problems however when I have switched ( or attempted to switch ) from running the egpu on an external monitor to the internal screen or vice versa the warning triangle comes up in device manager on the GTX 960 and I am told the GPU has encountered a Code 43 and that it has stopped working properly. Has anyone encountered similar issues? It seems that the only resolution is to completely uninstall all drivers using DDU or similar and then reinstall. Yet even that has decided to stop working for me now! Thank you and to everyone else for their great support so far. Any hints?! Quote Link to comment Share on other sites More sharing options...
Dschijn Posted May 3, 2016 Share Posted May 3, 2016 Uhhhh.. I don't really have an idea what that is. Wasn't the main problem, that MacBook with a dGPU do not have enough recources to add an additional GPU? Guess the best way would be do deactivate the dGPU. Still... jsut a guess Quote Link to comment Share on other sites More sharing options...
p3nzancef1ier Posted May 3, 2016 Author Share Posted May 3, 2016 @Dschijn It may be, will have another look. It may be the order in which I am activating/deactivating the egpu Quote Link to comment Share on other sites More sharing options...
p3nzancef1ier Posted May 5, 2016 Author Share Posted May 5, 2016 So it turns out it was just a matter of ensuring the external monitor was on before I started the computer! Problem solved... 1 Quote Link to comment Share on other sites More sharing options...
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