Windows 11 ((link)): Your Device Doesn T Support Miracast

: Sometimes, having a physical Ethernet cable plugged in can interfere with the Wi-Fi Direct protocols needed for casting.

Her laptop, a slim model she’d bought two years earlier, ran Windows 11. She clicked Settings → System → Display, scrolled to “Multiple displays,” and chose “Connect.” The quick-action pane scanned the air for the TV. A tiny blue dot pulsed. Then a single line of text blinked her confidence away: Your device doesn’t support Miracast. your device doesn t support miracast windows 11