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an unrecognizable LG monitor screen by the system

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Hello Gentlemens


I am asking you with a great request for help with a problem I can not deal with. 

I hope I have chosen a good section on this topic :)


I have been using my Hackintosh for some time now 

it does not cause me any more problems except for the one that irritates me


My problem: 


the system does not recognize my monitor and detects it as a 

monitor monitor VGA

13,9'' (800 x 600)

Gigabyte GeForce 9600 GT 512  MB



My monitor model: LG Flatron W2243S 





As you can see in the attached picture, the system does not recognize the monitor as a built-in screen


My main problem is that when the screen resolution is set to 1920x1080, black bars appear on the sides of the screen

It is not very comfortable, that's why I would like to change it and make the image look the whole width of the monitor

The monitor is connected to the graphics card with an adapter from the VGA connector to the DVI connector


this is my conifig.plist 





I hope that I described my problem in a comprehensible way, thank you very much for your help :) 



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