HDMI display does not display after installing FBCP driver

Phenomenon

For the following products:

RPi MHS - 3.5 inch Display

MHS - 4.0 inch Display - B

Following the steps of the wiki page to install the driver supporting FPCP, the above display can display normally.

However, the hdmi-connected monitor displays nothing or is prompted "input not supported", etc

analysis

Since the default output resolution of the driver installed in the above products is 480*320, and many traditional HDMI displays do not support HDMI input signal lower than 800*600, the HDMI display cannot display normally or even without display.

solution

Open the config. TXT file in the TF root directory,

Find hdmi_cvt 480 320 60 60 0 0 0 lines At the end of the file,

Change the value of 480 320 to the corresponding value of resolution above 800*600 (note the space),

Example: change to 1024*600 resolution

Hdmi_cvt 1024 600 600 60 600 00

Save and safely pop up TF, insert raspberry pie and restart.