GNOME Network Display not displaying on Google TV

General Help
1

It shows my Google TV. But when I connect it just shows a blank screen on my TV with a white line at the bottom across the screen.

2

Hi and welcome.

Zorin 18 is a fork of Ubuntu 24.04 so:

" GNOME Network Displays may not detect your Google TV on Ubuntu 24.04 due to missing system dependencies, incorrect display server setup, or issues with the Wayland session.

  • Check your display server : GNOME Network Displays works best under Wayland . If you're using X11 , ensure you have PipeWire , xdg-desktop-portal , and wireplumber installed. On KDE Plasma with X11, the Flatpak version often fails due to sandbox restrictions.
  • Verify system packages : Install the system (deb) package instead of Flatpak for better compatibility:
sudo apt install gnome-network-displays
  • Fix missing portals : The error Failed to create screencast session: No such interface “org.freedesktop.portal.ScreenCast” indicates missing portal support. Install:
sudo apt install xdg-desktop-portal xdg-desktop-portal-wlr xdg-desktop-portal-gnome wireplumber
  • Force software encoders if auto-selection fails (common on X11): Create a custom .desktop file with:
[Desktop Entry]
Name=GNOME Network Displays X11
Exec=env NETWORK_DISPLAYS_H264_ENC=x264enc NETWORK_DISPLAYS_AAC_ENC=avenc_aac gnome-network-displays
Icon=org.gnome.NetworkDisplays
Terminal=false
Type=Application
Categories=AudioVideo;
StartupNotify=true
Comment=Miracast on Plasma X11 with forced software encoders
  • Ensure WiFi Direct support : Confirm your WiFi adapter supports P2P (WiFi Direct) . Run:
iw phy | grep -A 5 "Frequencies"

Check for WFD (Wi-Fi Display) support in wpa_supplicant .

  • Use gdbus to debug if the TV still isn’t found:
gdbus call --system --dest fi.w1.wpa_supplicant1 --object-path /fi/w1/wpa_supplicant1 --method org.freedesktop.DBus.Properties.Set fi.w1.wpa_supplicant1 WFDIEs "<@ay [0x00, 0x00, 0x06, 0x00, 0x90, 0x1c, 0x44, 0x00, 0xc8]>"

If issues persist, check the Ubuntu 24.04 bug tracker or Reddit for known issues with Google TV Miracast compatibility.

AI-generated answer. Please verify critical facts."