Add a note about multi-display limitation

Secondary display mirroring is read-only before Android 10.
4 years ago · 0b4e484da0
parent d4eeb1c84d
commit 0b4e484da0
1 changed files with 4 additions and 0 deletions
--- a/README.md
+++ b/README.md
@ -396,6 +396,10 @@ The list of display ids can be retrieved by:
 adb shell dumpsys display   # search "mDisplayId=" in the output
 ```

+The secondary display may only be controlled if the device runs at least Android
+10 (otherwise it is mirrored in read-only).
+
+
 #### Turn screen off

 It is possible to turn the device screen off while mirroring on start with a