Hacker News Reader

Though DVI/HDMI monitors are supposed to handle 640x480, over half of the ones I have tested don't display anything. Every single one of them worked just fine at 1280x768, however, so I am changing my projects to use that.

View on HN

I'm surprised by this. 1280x768 is an unusual resolution, what display timings are you using?

I've found 1024x768 and 1280x720 are both well supported. I tend to use these display timings: https://projectf.io/posts/video-timings-vga-720p-1080p/

Thanks for the link. I meant to write 1280x720@60Hz for 16:9 HDMI TVs/monitors but have used 1024x768 quite a bit in the past for 4:3 VGA monitors and ended up mixing the two.

VIDEO_ID_CODE 4 (1280x720) works on all monitors I tested while 1 (640x480) only displays on half of them:

https://github.com/nand2mario/nestang/blob/master/src/hdmi2/...

did you try at 60hz? i've found a lot of monitors don't like 70mhz 720x400.. which is what bios often boots to on older computers. i'm not sure if they're running 640x480 at high refresh rate too.

Yes, I only tested the 60Hz vertical refresh options.

Reply on news.ycombinator.com