I’m downloading the last Android image posted by jasonl. The first one is corrupted and can’t be opened by WinRAR. If the newer archive can be opened, I’ll test the VESA resolutions (Dell 30", 2560x1600 native, w/ VESA scaling)
I don’t see how this could solve the issue of no display on a VESA monitor at boot, because that’s going to be a display chip firmware/microcode issue. Even a text screen won’t display.
Khadas: If you’re developing electronics for home entertainment, use only home entertainment equipment for development. If you’re developing electronics for the computing industry, use only computing industry equipment for development. A TV is not the same as a computer monitor and the VIM3 as sold doesn’t work with computer monitors. At all.
Also, it makes more sense to create an Ubuntu test build. It will be much smaller and it likely includes the tools to test all of the possible video timings.