HDMI: A64 Board not detecting the monitor max resolution

[a7med3365]

Im using A64-OLinuXino-2Ge16G-IND, with A64-OLinuXino-bullseye-base-20231106-081613.img.7z

We had one board that we were using for sometime and it was working smoothly with multiple monitors.
Then we bought another one, same specs and installed the same image, but we are facing issues with the hdmi resolution. the board for some reason is not detecting the monitor resolution and aspect ratio automatically. it display low resolution. and i need to unplug the hdmi multiple times until the board randomly gets adjusted to the max resolution available.

is it a firmware/drivers issue? or a hardware issue?

please suggest ways to resolve this, i tried multiple fixes i found online for Linux boards in general but nothing seems to work.

thank you and best regards

[LubOlimex]

Quite unlikely to be hardware issue since HDMI output gets tested empirically here.

What is the state of the Ethernet/PHY reset jumper between the two boards? Is it the same state?

If the jumper is set the same, then it is probably related to the state of video output set by the script, run olinuxino-display and try DISABLE option and reboot, if it doesn't work better then try all the other HDMI options one by one and see if any of them improves the behavior.

Let us know if the issue persists.