Screen resolution changes after turning the monitor on/off

Strange problem, when I shut off and turn on my monitor it automatically changes resolution and sometime the screen is just black.

I have a AMD Radeon HD 5570 and I'm using the latest video drivers , Windows 7 64x, and VGA.

Ps. Is DVI better than VGA ?
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  1. Best answer
    firstly, the easier question; DVI is better yes.

    Now with your issue, have you set the card to a resolution manually? It may be on Auto and doing auto screen adjustments. Set the resolution to the proper one and apply the settings in your AMD software.
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