Use NTSC format standard 59.94 Hz screen timings

[melquimachado]

Use 59.94 Hz screen timings, which is the NTSC format standard (used by games). It works very well with all panels and doesn’t affect the 355608-A9 panels with horizontal lines. It also doesn’t add any stuttering to the images; on the contrary, since it’s the NTSC standard, it will sync with most games. Note: It is used by Knulli with great success.

[antiKk]

It isn’t used by all games.
This statement is patently incorrect.

For example.
Any PAL game doesn’t.
Literally any console that isn’t outputting to an NTSC display doesn’t.

[melquimachado]

Yes, correct, but 59.98 doesn’t either, and have a compatibility disadvantage.

[bitter_bizarro]

[RG35XX H] horizontal lines appearing on display when playing a GBC game

Unfortunately, there is not a whole lot you can do… the panels are a bit of a mixed bag. Because we’re essentially pushing display timings right up to the edge of ~60Hz, some panels just don’t like it. It’s not uncommon to see issues like scan line banding or flickering, depending on the specific unit. For example, on my 35PRO, I get noticeable scan line banding at full brightness, but if I lower it to a mid-range level, everything smooths out. These kinds of quirks vary unit to unit. It’s …

[Delibirb77]

This isn’t true since you will experience dropped frames more often when playing 60 FPS content such as GBA as the screen timing strays further from 60.

If you prefer a different refresh rate, or there are issues with your specific hardware revision, there are instructions on how you can change the screen timing in the thread that @xonglebongle linked above.

Changing the screen timing for everyone will have detrimental effects, unfortunately, and will become a cat and mouse game as anbernic constantly make undocumented hardware changes depending on where the cheapest source of each component is.