Generic HDMI display doesn't work after update

Hi, I had another problem with generic display after update the zynthian. I had a problem that i solved with generic display (see past thread) but now i have another problem that i can’t solve.
This is my setup Rpi4 Generic HDMI a no picture are show. Before update display work after update with the same setting there are no picture.
Does the update procedure change the config.txt ?? are there any files to configure???
Thank

Yes the update changes the config.txt. you should be using the webconfig, setting your kit to custom and setting the display to generic hdmi.

Just did it but still now working

Oh that must have been frustrating. Can you bug over some webconfig screenshot and an example of what the working config you had in config.txt

even with a file diff it doesn’t work …