I have a Devterm with an XFCE4 desktop environment.
Using “vc4-fkms-v3d” option only shows the raspberry pi boot screen on the external monitor.
And the desktop works on the internal LCD monitor.
I can’t find the external one in this case.
On the other hand, only the external monitor works when using “legacy” driver.
The internal LCD monitor just blank screen.
Is it possible to use an external monitor with the KMS option?