Another attempt at using video and falling back to headless if nothing is found. Hopefully with better hardware support.

pi4/files/etc/X11/xorg.conf.d/10-headless.conf

@@ -6,18 +6,12 @@ EndSection
 Section "Monitor"
     Identifier     "Monitor0"
     Option         "DPMS" "true"
-    HorizSync       28.0-80.0
-    VertRefresh     48.0-75.0
-    Modeline        "1920x1080" 172.80 1920 2040 2248 2576 1080 1081 1084 1118
 EndSection
 
 Section "Device"
     Identifier     "Card0"
-    # Try standard driver
     Driver         "modesetting"
-    # Fallback to dummy
     Option         "FallbackDriver" "dummy"
-    VideoRam       256000
 EndSection
 
 Section "Screen"
@@ -27,6 +21,5 @@ Section "Screen"
     DefaultDepth    24
     SubSection     "Display"
         Depth       24
-        Modes      "1920x1080"
     EndSubSection
 EndSection