After updating to version 9.0.0 from version 8.3.9, my 7-inch display stopped working. Only touch works, but I am informed that there is no input signal at the HDMI input of this display.
I was found a solution:
Please change the option:
System -> Startup option -> Integrated audio
to Firmware Mode (Legacy)
I was found a solution:
Please change the option:
System -> Startup option -> Integrated audio
to Firmware Mode (Legacy)