Boot RPi 4 without monitor

[lucatun]

hi to all
I have a Raspberry pi 4 model B 4GB, I installed la OS Raspbian Buster

I have only problem, the raspberry didn't start without monitor.
I configured wifi and VNC, so when I started my RPi without monitor and I tried to connect with VNC I received a message the VNC connot show the desktop. so when I connect a monitor, it is black without image or desktop. So I rebooted the RPi with monitor (only monitor, without mouse or keyboard), the RPi started and I can connect with VNC and I can remove the monitor.

When I used the RPi 3 model B+ with OS Jessie or Strech I didn't have this problem, but it started without problem and I can connect with VNC.

Someone can help me with RPi 4, do you have same problem? there is some configuration to change to solve it?

thanks for your help

[pcmanbob]

Hi.

If you don't have a monitor connected then the pi4 does not start the frame buffer / desktop if you don't have a monitor attached .

To fix this problem you need to set a default resolution for when there is no monitor attached , this resolution must be different to that of your monitor.

to set the default resolution run sudo raspi-config and go to advanced options > resolution.

ref...
https://www.raspberrypi.org/documentati ... -config.md