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How to set display to 640x480 on Opi One

Alexandre
in Allwinner sunxi

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Hi,

 

I would like to know if there is a way to set the display resolution to 640x480, to use with an old CRT screen from a IBM PS/1 model 2011 that I want to revive.

I know about h3disp, but it only has high resolutions, and that old screen does not want to sync correctly to anything other than VGA.

I use an Orange Pi One, with a HDMI to VGA adapter and Armbian 5.35, with legacy kernel 3.4.113

 

Thank you!

-Alexandre

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