Boot to Qt does not work with raspberry pi 5's touch display 2.

[Aniket Sedhai]

Hello, I have been trying to develop some application using QT Creator and Boot2Qt for raspberry pi. I have a raspberry pi attached to 7 Raspberry Pi touch display 2 and also a monitor connected by HDMI cable. When I boot the raspberry pi loaded with Boot2Qt image, it successfully displays boot loader screen and eventually QT screen on hdmi connection but nothing on the Raspberry Pi Touch Display 2.

I updated dt-overlay to vc4-fkms-v3d from the original vc4-kms-v3d after coming across a years old ticket. However, that did not help anyways.

Does anyone know what is wrong here and what I can do to fix it?

[SGaist]

Hi and welcome to devnet,

Since you marked your ticket as solved, can you share what you did to fix your situation ?

[Azertyaaaa]

In case it might help, I solved the issue by replacing the dtoverlay given in the QT Doc :

dtoverlay=vc4-kms-dsi-7inch

With the one given on the Raspberry Website :

dtoverlay=vc4-kms-dsi-ili9881-7inch

Also, don't forget to make these changes in /etc/kms.conf, otherwise you will end up seeing just the console :

{
    "hwcursor": false,
    "device": "/dev/dri/card1"
}