It will work for now, but the fkms driver is no longer supported.Replace the dtoverlay=vc4-kms-v3d with dtoverlay=vc4-fkms-v3d
Making the change resolved my issue. At least for now.
My question is this. Is this a sustainable work-around?
What is probably happening is that your screen isn't returning a good EDID to the Pi. The old drier was quite forgiving in that case, but the new one is stricter.
Hard coding the parameters for your screen in the cmdline.txt file may get your screen working with the new KMS driver.
Adding something like video=HDMI-A-1:1024x600@60D to the line in /boot/firmware/cmdline.txt might be enough.
cmdline.txt must all be on one line. Any extra lines get ignored. There should be a space between each parameter.
Statistics: Posted by rpdom — Tue Jan 09, 2024 10:07 am