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I am running in Multi-Monitor mode/Twinview mode but my OpenGL games won run. How can I fix this?

April 26, 2017Fix Games mode multi-monitor OpenGL run running twinview

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I am running in Multi-Monitor mode/Twinview mode but my OpenGL games won run. How can I fix this?

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Under Windows 98/ME/2000/XP/NT4, when using a dual monitor setup, certain OpenGL games will not run. This is not an issue with the drivers themselves, but with the OpenGL API, which can only accelerate one hardware graphics card at a time. To fix this problem, simply disable the second monitor and your OpenGL 3D program will work again. Direct 3D does support multi-monitors and should not experience this type of problem. Some OpenGL applications will operate in dual monitor mode but will revert to software rendering where the performance will be at a reduced speed. Most OpenGL applications however, will detect that the renderer is not working and simply refuse to execute, such as Quake III Arena.