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Troubleshooting

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github-actions[bot] edited this page Jul 31, 2026 · 5 revisions

Troubleshooting

Start with the narrowest failing layer: server, network, pairing, content, manifest, playback, Android capability, or the Linux graphical session.

Most sections apply to both Players. Linux player issues contains information about these Linux functions:

  • Graphical session
  • systemd service
  • Framebuffer preview
  • AppImage self-update

Server does not open

Check containers:

docker compose   --env-file deploy/docker/.env   -f deploy/docker/compose.yml   ps

Check health and readiness:

curl http://127.0.0.1:8080/healthz
curl http://127.0.0.1:8080/readyz

Read logs:

docker compose   --env-file deploy/docker/.env   -f deploy/docker/compose.yml   logs --tail=300 server postgres

Common causes:

  • missing or invalid POSTGRES_PASSWORD
  • PostgreSQL volume or permission failure
  • unwritable tilecast_data volume
  • FFmpeg or FFprobe readiness failure
  • port 8080 already in use
  • reverse proxy pointing to the wrong service

Browser login loops or fails behind HTTPS

Confirm:

TILECAST_PUBLIC_URL=https://the-exact-hostname.example.org
TILECAST_COOKIE_SECURE=true

The browser origin, proxy hostname, and configured public URL must agree.

Player cannot discover the server

Discovery is optional and may fail because of:

  • Docker bridge networking
  • different VLANs
  • guest Wi-Fi
  • AP or client isolation
  • multicast filtering
  • routed networks

Enter the server URL manually.

Player rejects the server URL

Public hostnames require HTTPS. Plain HTTP is accepted only for private, link-local, localhost, and .local destinations.

Do not replace an HTTPS URL with HTTP to work around a certificate or proxy problem. Fix HTTPS.

Pairing code is not found

  • Codes expire after ten minutes.
  • Confirm all six characters.
  • Create a new request on the TV.
  • Confirm the browser is on the same Tilecast installation.
  • Check that an access gateway is not blocking player API requests.

Previously paired player asks to pair again

Review the request before deleting anything.

If Studio recognizes the stable installation ID, use Repair and replace credential. This preserves assignments and revokes the old credential only after successful enrollment.

Screen is Offline, Stale, or Recently online

  • Recently online: last contact within two minutes
  • Stale: more than two and no more than fifteen minutes
  • Offline: more than fifteen minutes

Check:

  • TV and player power
  • Wi-Fi association
  • DNS
  • server reachability from the TV network
  • reverse-proxy WebSocket support
  • changed Wi-Fi credentials
  • captive portal
  • Android background restrictions
  • server logs

Cached playback can continue even while Studio reports a connectivity problem.

Media remains Waiting or Processing

Check /readyz, free disk space, and server logs.

Open the asset to view its error. Failed items can be retried after correcting the underlying problem.

Large video files may need substantial temporary free space during processing.

Website Source does not load

Check:

  1. The URL works on another device on the same network.
  2. Public URLs use HTTPS.
  3. Private HTTP is enabled only when intentionally allowed by the server administrator.
  4. The top-level navigation host is allowed.
  5. JavaScript, DOM storage, and cookie policy match the site.
  6. The load timeout is long enough.
  7. The site does not require credentials Tilecast does not store.
  8. A fallback image or safe failure behavior is configured.

The server validates Website configuration but does not fetch the page on behalf of the player. A page can be valid yet unreachable from the TV network.

YouTube Source fails

  • Confirm the TV network can reach YouTube and the embedded player.
  • Confirm the URL is a supported video or playlist URL.
  • Check start and end values.
  • Try the placeholder or fallback image behavior.
  • Remember that YouTube is streamed and is unavailable offline.

Wrong playlist is showing

Check in this order:

  1. Active emergency
  2. Winning schedule
  3. Direct fallback assignment
  4. Manifest synchronization state

For schedule conflicts, check priority, direct versus group targeting, effective start, timezone, enabled state, and device clock skew.

New content never activates

A pending downloaded manifest does not activate until every required file passes size and SHA-256 verification.

Check:

  • player storage
  • cache limit
  • minimum free-space policy
  • media delivery endpoint
  • network interruption
  • failed content items
  • manifest error shown in Studio

The old working manifest should remain active.

Managed Kiosk requested but not active

Requested policy is not proof of capability.

Managed Kiosk requires compatible device-owner/device-policy provisioning and confirmed lock task. Consumer Fire TV firmware may not support it.

Accessibility Control requested but not active

Enable the service manually in Android Accessibility Settings on that player. Server policy cannot grant the permission.

TV stays on outside active hours

Tilecast may only be able to show black. It does not send direct HDMI-CEC commands.

Review the reported sleep strategy and the per-screen physical Power Assist test.

Player enters safe mode

Use the local maintenance sequence:

Back, Back, Up, Down, Select

Enter the maintenance PIN, review self-test and recovery state, then retry or exit safe mode after correcting the failure.

Owners and Administrators can also use typed recovery and synchronization commands from Studio.

Update waits for permission or user

On the TV, allow Tilecast Player under Install unknown apps, then approve the Android or Fire OS system installer.

These states are expected. Tilecast does not claim silent installation.

Linux player issues

These apply to the Linux AppImage. Server, network, pairing, content, and playback-selection sections above apply to Linux screens too.

Start with the logs

For a systemd user installation:

systemctl --user status tilecast-player
journalctl --user -u tilecast-player -n 200 --no-pager
journalctl --user -u tilecast-player -f

For an interactive diagnostic run:

systemctl --user stop tilecast-player
TILECAST_LOG_LEVEL=debug TILECAST_WINDOWED=1 \
  ~/tilecast/tilecast-player.AppImage --appimage-extract-and-run

Stop the interactive copy before restarting the service. Tilecast allows only one player instance at a time.

The AppImage does not open

Confirm it is executable and owned by the kiosk user, and not run as root:

ls -l ~/tilecast/tilecast-player.AppImage
chmod +x ~/tilecast/tilecast-player.AppImage

If the terminal reports a FUSE error, start the Player with --appimage-extract-and-run. Make sure that the systemd service contains this argument.

This supported mode is the Tilecast default. It does not require a FUSE package and supports managed self-updates.

If systemd cannot open the display, the service probably started without a graphical session. The display environment value can also be incorrect.

Check DISPLAY and WAYLAND_DISPLAY.

The service is running but no window appears

Check the current graphical environment:

printf 'DISPLAY=%s\nWAYLAND_DISPLAY=%s\n' "$DISPLAY" "$WAYLAND_DISPLAY"

Run the AppImage manually from a terminal inside the same desktop session. If that works, add the required display variable to the systemd drop-in. Also verify the service's ExecStart path exactly matches the AppImage location.

Change the saved server address

The saved address is stored at ~/.local/share/tilecast-player/server.json. Stop the service, remove only that file, and restart:

systemctl --user stop tilecast-player
rm ~/.local/share/tilecast-player/server.json
systemctl --user start tilecast-player

A credential enrolled with another Tilecast installation is not sent to the new server.

Re-pair the same installation

Remove or revoke the old screen in Studio when possible, then remove the credential and unfinished pairing session while preserving installation.json:

systemctl --user stop tilecast-player
cd ~/.local/share/tilecast-player
rm -f credential.json pairing-session.json
systemctl --user start tilecast-player

Preserving installation.json keeps the stable Player installation ID. Moving the complete data directory creates a new local identity.

This operation also removes cached content. After this operation, remove the old screen record in Studio.

Content is black, corrupted, or stuttering

Test with hardware video decode disabled, then software rendering:

TILECAST_HW_DECODE=0 TILECAST_WINDOWED=1 ~/tilecast/tilecast-player.AppImage
TILECAST_DISABLE_GPU=1 TILECAST_WINDOWED=1 ~/tilecast/tilecast-player.AppImage

Apply a successful setting with systemctl --user edit tilecast-player. Use H.264 video when possible.

Test the display resolution and refresh rate. On low-performance hardware, do not overlap videos in different Layout zones.

Before network disconnection, make sure that all media downloads are complete.

Cached content disappears after reboot

The service may run as a different user or with a different TILECAST_DATA_DIR than the interactive test:

systemctl --user show tilecast-player -p Environment
ls -ld ~/.local/share/tilecast-player

Keep the data directory on persistent local storage.

Live preview is unavailable or black

On X11, Tilecast captures the display framebuffer. Thus, video overlays and website content appear in the preview.

On Wayland, screen capture usually requires a desktop portal. The portal can show a prompt that an unattended kiosk cannot answer.

The Player uses window capture by default on Wayland. Window capture can omit hardware-overlay video and embedded website frames.

Use one of these options:

  • Use X11 for the kiosk session.
  • Accept and save the Wayland portal permission when the system supports this operation.
  • Test with TILECAST_PREVIEW_SCREEN_CAPTURE=1.
  • Set TILECAST_PREVIEW_SCREEN_CAPTURE=0 when the portal blocks startup.

A preview failure does not stop normal playback.

Remote AppImage update fails

Studio-driven Linux updates require a managed AppImage. The --appimage-extract-and-run mode keeps the managed state because it preserves $APPIMAGE.

A development run does not have a managed state. A manually unpacked squashfs-root/AppRun also does not have a managed state.

Make sure that these conditions are correct:

  • The kiosk user can write to the AppImage and its parent directory.
  • The release is a Linux release with a signed update manifest.
  • The device has sufficient free space for the staged AppImage.
  • The systemd service points to the active AppImage.

The display still sleeps or shows a lock screen

Tilecast requests a display-sleep blocker. Desktop policies can still lock or suspend the session.

Disable the lock screen, screensaver, suspend, and hibernate functions for the kiosk account. Test the monitor sleep timer separately.

Active hours replace playback with black or the configured outside-hours presentation. An emergency has precedence over this behavior.

Still stuck

Collect the information listed in Support and Contributing without including credentials, tokens, signing keys, or private URLs.

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