VNC without a display

[elsabz]

On my Orange Pi 5, I have successfully installed the X11VNC server. I followed the guide at the following link X11VNC and everything works as expected. I can connect with Real VNC from another device and see the desktop of the Orange Pi as if I were in front of its display. However, when the Orange Pi 5 is powered on without a display connected to the HDMI port, the access with Real VNC doesn't work as before. I get a black screen and I am unable to interact with the Orange Pi. I had a similar issue with Raspberry Pi, where I could resolve it by setting a default screen resolution. How can I achieve this with Armbian? How can I configure an alternative resolution when the HDMI port is not connected?

[royk]

Already tried a virtual display?

https://help.realvnc.com/hc/en-us/articles/360004324217-Beginner-s-guide-to-Virtual-Mode#what-is-virtual-mode--0-0

[elsabz]

@royk thanks for the answer but this Virtual Desktop is out of the discussion, what I want is to reach the same point that I had experimented with Raspberrypi. With the raspi-config I could set a fixed resolution that was activated even if there was no display connected to the hdmi. Achieving this result would be the goal of this discussion, thanks anyway!