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ATI Radeon HD 4870's fullscreen video output is only 1024x768 resolution?

Question asked by ant on Jun 1, 2016

Hello.

 

On my 23" HDTV 1920x1080 monitor with ATI Radeon 4870 HD's VGA and DVI

connections on my very old Windows XP Pro SP3 computer, I cannot make

the fullscreen video overlays from video players more than 1024x768

resolution. Desktops are OK at 1920x1080. I know I can drag my video

players to the HDTV and manually fullscreen, but that is a pain because

I want to control the videos on my 1920x1080 computer monitor. Going

between windowed and fullscreen is annoying.

 

Is there a way to force the video driver's theater mode overlay to the

correct resolution so I can get the fullscreen video's aspect ratios

correct?

 

Thank you in advance.

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