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Follows the security audit (#5/#9): the GameStream-compat plane carries inherent on-path weaknesses that can't be fixed on the wire without breaking stock Moonlight — its pairing runs over plain HTTP (#9, MITM-able during the pairing window) and its legacy control encryption can reuse GCM nonces (#5, a passive eavesdropper can recover/forge input). The native punktfunk/1 plane (SPAKE2 PIN pairing + per-direction AEAD nonces) has neither. So flip the default to secure-by-default: - `serve` → native punktfunk/1 plane + management API ONLY (no GameStream surface). - `serve --gamestream` → ALSO the GameStream/Moonlight-compat planes (nvhttp pairing, RTSP, ENet control, _nvstream mDNS). Opt-in, logged with a trusted-LAN caveat. `--moonlight` is an alias. - The native plane is now ALWAYS on in `serve` (`--native` is a kept-for-compat no-op); the unified GameStream+native host is `serve --gamestream`. `gamestream::serve` gates the GameStream spawns (nvhttp/rtsp/control/mdns) on the flag; the native plane + mgmt + native-pairing handle always run. To avoid silently regressing validated Moonlight deployments, the explicit deployment configs PRESERVE Moonlight via `--gamestream` (each documents dropping it for a secure native-only host): the Linux systemd unit, the Steam Deck installer, and the Windows service default (DEFAULT_HOST_CMD). The bare `serve` default (new/manual use) is secure. Docs swept to match (host-cli, moonlight, quickstart, install, packaging READMEs, CLAUDE.md, README, …): Moonlight setup now instructs `--gamestream`; native/console refs use bare `serve`. OpenAPI regenerated (a stale "run `serve --native`" string). fmt + clippy clean; 94 host tests green. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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title, description
| title | description |
|---|---|
| Troubleshooting | Common problems setting up or using a punktfunk host, and how to fix them. |
The host isn't found on the network
- Make sure the host is actually running (
systemctl --user status punktfunk-host, or you see it listening in the terminal). - Host and client must be on the same network/subnet. Discovery uses mDNS, which doesn't cross routed subnets or most VPNs-without-multicast. As a fallback, add the host by IP address in your client.
- A firewall on the host can block it. The native protocol's control plane uses UDP port 9777. The per-session data plane uses an ephemeral UDP port negotiated at connect time (currently random) — for a strict firewall, open a UDP range or move the data port. GameStream/Moonlight uses TCP 47984/47989/48010 + UDP 47998–48010 + ENet UDP 47999. Allow them on the host's firewall.
nvidia-smi says it can't communicate with the driver
- The NVIDIA kernel module didn't load. With Secure Boot enabled, enrol the module's signing key:
sudo mokutil --import /var/lib/shim-signed/mok/MOK.der, reboot, Enrol MOK at the blue screen (or disable Secure Boot). On Fedora, follow RPM Fusion's Secure Boot steps. - After a kernel update the module may need a rebuild — reinstall the driver package.
The desktop won't start, or "GPU … not supported by EGL"
The NVIDIA GL/EGL userspace is missing — the base driver package doesn't always include it.
- Ubuntu:
sudo apt install libnvidia-gl-<version>(matching your driver). - Confirm
/usr/share/glvnd/egl_vendor.d/10_nvidia.jsonexists andnvidia-drm modesetisY.
Black screen / no picture, but the client connects
- You must be on a Wayland session, not X11 (check the login-screen session picker).
- KWin must be ≥ 6.5.6 (
kwin_wayland --version); GNOME ≥ 48; gamescope ≥ 3.16.22. - Confirm
PUNKTFUNK_COMPOSITORinhost.envmatches your desktop.
Capture fails: "Session creation inhibited" (GNOME)
A locked GNOME session blocks screen capture. On an always-on/headless host, disable the lock:
gsettings set org.gnome.desktop.screensaver lock-enabled false
gsettings set org.gnome.desktop.session idle-delay 0
See Running as a Service.
A controller is detected but does nothing (Bazzite)
The host user needs to be in the input group. On Bazzite:
ujust add-user-to-input-group
Then log out and back in. On other distros this is sudo usermod -aG input $USER + re-login.
Pairing is rejected / the client can't connect
- The host requires pairing by default. Arm pairing from the web console, then enter the PIN on the client. See Pairing & Trust.
- If you re-installed the host, its identity changed — re-pair the client.
Stutter, drops, or high latency
- Lower the bitrate. On a busy or Wi-Fi link, the requested bitrate may be too high — the native clients' speed test picks a safe value; with Moonlight, set it manually.
- Prefer a wired connection or 5 GHz Wi-Fi between host and client.
- Streaming to many devices at once shares the GPU encoder. The production host
(
serve) handles one native session at a time, with extra clients queued; heavy load is usually bitrate-bound, so lower the bitrate first.
Still stuck?
Run the host with RUST_LOG=info (or debug) and check journalctl --user -u punktfunk-host for the
error around the failed connect or capture.