sudomod

Finally got around to testing the HDMI output and there are red pixels all over the screen. I tried two different monitors and they both identified the output as 1080p and stretched it to fill the screen. Output to the LCD looks perfect. I tried setting HDMI output to 320x240 in config.txt but that just prevented it from booting at all.

Hm, can you add to the end of config.txt:
You could also change it to 11 (which is the max) and see if that helps?

If that doesn't help, can you try:
And then lastly can you try a different cable and a different TV/screen?

Well, the first time I booted it up today there were no red pixels, but after I moved the add-on board around to plug in a keyboard they came back. I flipped the board over to play with the ribbon cable and now I can't get them to appear again. I think the ribbon cable might have just been pinched. I'm going to not worry about this until I get it in the case and everything positioned how it will stay. If it's a problem then, I can try replacing the ribbon cable.

So, separate question: is there a way to set the HDMI output to 320x240? Both monitors I tried identified the output as 1080p. I tried your suggestions, but neither of them helped.

HDMI doesn't actually have that mode, the lowest is 640x480.. i haven't done enough experimenting to really give a proper answer You can try cleaning the contacts on the FPC and also put kapton tape on the back board.. if you stuck tin foil on the FPC and the wrapped kapton tape around it (to prevent shorts to anything) that would provide shielding (if that is the issue)..

Alright, thanks. I'll give those a shot if it's still a problem.

Have you tried HDMI output with the 640x480 LCD attached? Curious if that outputs 640x480 or 1080p.

EveningNewbs wrote: ↑

Thu Mar 01, 2018 7:28 am

Alright, thanks. I'll give those a shot if it's still a problem.

Have you tried HDMI output with the 640x480 LCD attached? Curious if that outputs 640x480 or 1080p.

I haven't actually tried! However what I'm going to do is make a menu option that allows a 'one time reboot to HDMI' which will set the main buffer to HDMI (e.g. REAL 1080P) and then treat the internal screen as the 'secondary' and scale it down (so 1080P -> 320x240) .. this means when looking at the TV it's HD and the internal screen still shows stuff but very small.. after a reboot it will swap back..

The idea being that this way it doesn't matter what the internal res is, because if you're plugging in HDMI then you obviously want it higher on the TV! I've made this issue to track it: https://github.com/kiteretro/Circuit-Sword/issues/28