Hi there, lets dig this up.

So I tried and I tried. I have a special situvation though as I use retrotink with vga out. So I want to use 240p@120hz but ES do not look good at 240p. So I thought the above info would help
(here it is in english btw: https://github.com/recalbox/recalbox-os/wiki/Connect-your-recalbox-to-a-CRT-with-HDMI-(EN) )
but no. Im also runing recalbox from a usb drive as my sd card is to small for all games.

So i edited the conf(usb) and the config(SD) on the usb and sd card. But no, ES would still use the the hdmi timings listed in the config file. What am I Doing wrong here? is it because im using a usb? and what are the folder for with a . in front of them. I know rgb-pi had this done so I know it can work, yes I asked him, wont help, cant blame him though being that retrotink is a competing product.