Wittel Posted July 28, 2011 Share Posted July 28, 2011 I have NVIDIA GTS240 in my system (10.6.8). It is enabled by EFI string and works perfectly with the primary display connected to the graphic card's primary DVI port. I have also a TV that is usually connected to the PC by HDMI-cable to the secondary DVI port (using DVI-HDMI Adapter). So, if the TV is connected I have black screen just after the booting process ends. I can see verbose-mode messages, it tries to switch to the graphic mode, and it freezes... If I try to plug the TV on the working Mac OS it freezes immediately: screen holds its last image, but key pressing or mouse moving has no effect. I read in the topic that is the known issue of the NVIDIA 2xx graphic cards and there is no solution to enable secondary HDMI display properly. As for me, it is not important to have a dual monitor system. It's sufficient for me to use my TV only from Windows to look the films sometimes. But it is very inconvenient to check every time I want to boot Mac OS if the HDMI cable is unplugged. May be there is a method to disable secondary DVI port in Mac OS at all? That the system couldn't ever discovered that there is a second display? For example, preparing the EFI string we can see in XML something like this "<string>NVDA,Display-B</string>" etc. I apologize I'm not an expert, but may be it is possible to delete some strings in EFI's XML that the system "don't see" the secondary port and the display on it? Link to comment Share on other sites More sharing options...
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