Hi there, I m using a waveshare 3.5 inch screen 640x480 together with my radxa zero 4gb/32gb emmc.
I m running the official debian image and as you can see my screen is shifted down a couple of pixels. (Notice the blue pixels above the xfc panel as well as the bottom taskbar that is cut a couple of pixels)
The resolution seems to be correctly detected. How can I solve this?
EDIT: Solved this. this is how:
Followed the guide to manually set the resolution from here, more specifically step 3.
Instead of using cvt or gtf to calcualte modeline, use this online tool. Input the resolution and refresh rate of screen and THICK Image margin (to correct overscan). Then copy the modelin in the file as per the guide and reboot.
It worked for me, tested on armbian jammy. Will test on debian as well.
Inspired from this post: Debian Buster: HDMI Output Shifted Down