Unless I’m mistaken, RetroArch’s natural resolution when SwitchRes is on is 320x240 (or 1920x240 for super).
So, I just tried to setup my modern PC (It’s running an AMD RX 590) with my ‘current’ adapter and It’s a no go. Because of course not lol I’m talking:
- GPU > HDMI > VGA > Component
- GPU > DVI > VGA > Component
- GPU > DVI > HDMI > VGA > Component
- Onboard > HDMI > VGA > Component
- Onboard > DVI > VGA > Component
- Onboard > DVI > HDMI > VGA > Component
(I know a lot of those seem redundant, but my DVI to VGA adapter is also a splitter, so it was worth a shot to do some of the extra tries) All of them, I made 0 progress with CRU. Which is greatly frustrating. CRU was like magic perfection with my 31Khz monitor on this PC.
I’ve been running a separate PC with an older GPU specifically for CRT EmuDriver. So I’m trying to re-wrap my head around this. As I’m thinking, I have yet to get my 15khz TV to connect to my modern GPU, only the 31khz.
I am gonna dig out my Porta adapter, since I still have it and play with it. Maybe I can at least replicate what you are seeing and go from there.