26 Jul 2016, 19:49

This all depends on your HDMI2VGA dongle. On the 2 I own, even if they are the same brand, one is "better" than the other.

A good dongle will be able to get the resolutions your monitor supports and tell recalbox about them.

The only thing you must change manually is the global.videoconfig var in the recalbox.conf file and set it to the the DMT mode corresponding to 640x480@desired refresh rate. That's the best case

If your dongle is crappy, you would have to force the resolution in the /boot/config.txt

I can't stress enough to read the "video configuration detailed" on the wiki, you will get a nice overview of how video works on the pi and recalbox 🙂