I am using the command-line image viewer and video viewer to display images and videos on a 2 x 2 matrix of P3 64x64 matrices that I ordered from electrodragon along with their HUB75 hzeller Pi shield. I connected P4 to GND and P8 zu #E for using the 64 x 64 panels. My images and animations all contain colourful objects on a black background. When I display them, I always get some random horizontal linear pixel glitches/artefacts next to the outline of the shapes I am drawing as visible in the photo below. These are also visible when running the demo D0. I have tried different panels from amazon and different panel sizes (1x2, 1x1) but no change. I also tried all options discussed under the “ghosting” issue in the readme to no avail. Does anybody have an idea what might be causing this?
battery: do you mean the old electrodragon active-3 board? If so, it’s for an optional RTC on the board. You can likely ignore that.
ghosting: I don’t see this but the best things I can think about are
change the ribbon cables, get better ones, get shorter length
make sure your power ground between rPi and panels is the same
sadly that’s not easy to debug, but I’m not seeing this on any of my panels or boards.
Thanks for the power ground tip, panels and Pi are currently not on same ground and I had grounding issues with audio equipment in that room before so thats def a possibility, will try that and report back.
ok, good news on grounding, that is most likely your issue.
RGB Matrix Panel Drive Board For Raspberry Pi V2 - ElectroDragon is the new version of the board, it just simplifies the board, removes the RTC almost no one used, and adds angle connectors to make the profile a bit more flat.
You don’t need to change boards, yours is functionally equivalent.
