Aspect ratio/Resolution issues on LCD Arcade Monitor

[Tathan]

Hello everyone!

 

I've been struggling for months with an issue on a SEGA ALLS MX2.1, but I presume the issue is more related to the screen itself.

Oddly enough, the screen on the IDZ cabinet is a 40" monitor, but in Device Manager it is detect as a "D21L051". I have two cabinets and both give me the same name. This issue comes with a weird "glitch", which is that he recommends me a lot of resolutions that aren't supported by the screen. You can see on my first picture of the topic the 1920*1200 resolution, that is automatically chosen by 90% of the games I play.

 

To solve this issue, I edited some files so that the screen had a 1920*1080 max resolution (deleting the 1920*1200 "option"), but it came with another issue that, I presume is related, so, maybe this wasn't the best way to correct this issue.

 

 

When I try to run upscaled arcade games, I have a LOT of issues. The screen doesn't fit, is very small and stretched, there's deformation,.... I know that this can happen with bad patches, but to make sure that it wasn't just a config problem, I tried the same game files on my ALLS UX (32 inch monitor) and everything worked perfectly in 1080p. 

 

Any advice? I tried messing around with the scaling settings, but it didn't seem to do change anything.

 

 

Thanks in advance!!