Hello,
The mission: to change display resolution for "None-1" ('unknown display') - when no physical screen/display/monitor is attached.
Machine: Banana Pi M5 (Bpi M5).
I use it as a headless machine (without any monitor connected) and access it via a remote control/share screen application (such as: Teamviewer).
The problem: the display is very small as the resolution is set to 720 X 576.
I couldn't find any way or method to define/change the resolution in such a case.