The Pi5 is only designed for 4K resolution. Anything above 4096 wide is untested and unsupported.What could be causing this issue?
There is related thread here.
It sounds like disabling wayland (I think effectively disabling gpu acceleration) may give you an image.
You can probably force a supported resolution with a line like "video=HDMI-A-1:3840x2160M@60D" in cmdline.txt.
Statistics: Posted by dom — Fri Oct 17, 2025 11:44 am