enricobuehlerandClaude Opus 5
020306b5ac
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Fallout from the documentation sweep: verifying doc claims against the code
turned up defects in the code and the shipped templates. Mostly comments that
describe behaviour we no longer have — which is how the docs went wrong in the
first place, since someone reads the comment and writes the page.
The one that mattered: a fresh deb/RPM/Arch install could not start the host at
all. The unit's `EnvironmentFile=` had no `-`, making host.env mandatory, and no
package creates it — all three ship only the templates under /usr/share and the
postinst merely prints the copy command. So `systemctl --user enable --now
punktfunk-host` died on "Failed to load environment files". Every field in
HostConfig::from_env resolves through unwrap_or/filter/None, so absent means all
defaults, exactly like a hand-run `serve`; the Nix module already wrote it as
`-${environmentFile}`. The Deck installer's own generated unit gets the same
prefix for the case where an operator later removes the file.
Shipped templates: PUNKTFUNK_SECURE_DDA is read by nothing (DDA/WGC are gone;
IDD-push is the sole Windows capture path and the secure desktop is
unconditional), so it stops being written into a fresh host.env;
PUNKTFUNK_INPUT_BACKEND offered a `uinput` value that does not exist and omitted
`kwin`, which is what a KDE session actually resolves to; PUNKTFUNK_RENDER_ADAPTER
no longer claims to pick a "Desktop-Duplication" GPU.
Comments corrected rather than deleted, since each explains a real why:
PUNKTFUNK_10BIT is default-on with explicit-off grammar, not an operator opt-in;
GNOME reaches EIS through Mutter's direct RemoteDesktop API, so it needs no portal
approval and is headless-capable; and the host does not run in session 0 — the
service is the session-0 supervisor and the host runs as SYSTEM in the interactive
console session, which is why game_term has to bind the input desktop at all.
packaging/bazzite/update-punktfunk.sh is now installed to /usr/share/punktfunk/,
so the command the docs promised exists.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
118 lines
8.6 KiB
Bash
118 lines
8.6 KiB
Bash
# punktfunk host configuration (~/.config/punktfunk/host.env) — consumed by punktfunk-host.service.
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#
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# YOU BARELY NEED THIS FILE. The host AUTO-DETECTS the live session per connect — which compositor
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# is running (KWin / Mutter / sway / Hyprland / gamescope), its Wayland socket, session bus, and the
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# matching input backend — and FOLLOWS the box when it switches between a desktop and Steam Gaming
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# Mode, even mid-stream. Everything below except PUNKTFUNK_VIDEO_SOURCE is an optional override.
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#
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# Two rules that save debugging sessions:
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# * Keys are CASE-SENSITIVE. `punktfunk_gamescope_attach=1` sets nothing — use the exact
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# uppercase names.
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# * On a desktop you actually use, do NOT set PUNKTFUNK_COMPOSITOR / WAYLAND_DISPLAY /
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# XDG_CURRENT_DESKTOP. Pinning the compositor DISABLES session-following (a switch to Game
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# Mode mid-stream then kills the stream instead of being followed), and stale session vars
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# point detection at dead sockets. Those knobs are for CI and dedicated appliances (below).
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# Video source: `virtual` creates a per-client virtual output at the client's exact
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# resolution+refresh (the flagship mode); `portal` captures an existing monitor.
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PUNKTFUNK_VIDEO_SOURCE=virtual
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# GPU zero-copy capture (dmabuf → CUDA → NVENC / VAAPI / Vulkan) is ON by default and falls back to
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# CPU automatically. No need to set it. Set to 0 only to force the CPU path.
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# PUNKTFUNK_ZEROCOPY=0
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# The name this host shows up under in Moonlight and the Punktfunk clients. Defaults to the
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# machine's hostname; set it to give the box a friendly name without renaming the machine.
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#PUNKTFUNK_HOST_NAME=Living Room
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# --- Session anchors (rarely needed) -------------------------------------------------------
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# As a `systemctl --user` service the host inherits the correct XDG_RUNTIME_DIR from systemd and
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# derives the bus (`unix:path=$XDG_RUNTIME_DIR/bus`) itself. Set these ONLY when running the host
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# outside a user service (ssh, cron) — and with YOUR uid (`id -u`), never a copy-pasted 1000: a
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# wrong uid points the host at another user's (nonexistent) PipeWire/D-Bus, and every session
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# fails with errors like "pw audio connect … Creation failed".
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#XDG_RUNTIME_DIR=/run/user/<uid>
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#DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/<uid>/bus
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# --- Steam Gaming Mode (Linux boxes with gamescope session infra: Bazzite/SteamOS/Nobara) ---
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# Game Mode is auto-handled; two models decide WHERE it runs when a client streams:
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# * MANAGED (the default where session infra is detected) — the host relaunches the gaming
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# session HEADLESS at the CLIENT's exact mode ("game mode on the virtual screen"); physical
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# displays drop out of it, and the box is restored on a debounced idle after disconnect.
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# * ATTACH — the BOX owns its session: Game Mode stays on the physical screen and the host
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# captures/follows it, never tearing it down. Reconnects land wherever the box is.
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#PUNKTFUNK_GAMESCOPE_ATTACH=1 # pick the ATTACH model
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#PUNKTFUNK_GAMESCOPE_MANAGED=1 # force MANAGED even where infra detection wouldn't pick it
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#PUNKTFUNK_GAMESCOPE_SESSION=steam # host owns a gamescope-session-plus session at the client mode
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#PUNKTFUNK_GAMESCOPE_NODE=auto # raw attach: discover + capture a running gamescope's node
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# # (do NOT combine with SESSION)
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#PUNKTFUNK_GAMESCOPE_APP=vkcube # nested command for ad-hoc bare-gamescope sessions
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#PUNKTFUNK_SESSION_WATCH=0 # disable mid-stream Desktop<->Game following (on by default
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# # on gamescope-infra boxes)
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# --- Force a backend (CI / tests / dedicated single-session appliances ONLY) ---------------
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# PINS the backend: the host stops following the live session entirely — per connect AND
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# mid-stream. Fine for a dedicated headless appliance (punktfunk-kde-session.service, a pure
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# gamescope box) or a CI run; wrong for any box that switches sessions.
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#PUNKTFUNK_COMPOSITOR=kwin # kwin | mutter | gamescope | wlroots | hyprland
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#PUNKTFUNK_INPUT_BACKEND=kwin # wlr | kwin | libei | gamescope — anything else logs "unknown
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# PUNKTFUNK_INPUT_BACKEND" and auto-detects instead:
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# PUNKTFUNK_COMPOSITOR above wins (except mutter), else
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# XDG_CURRENT_DESKTOP — KDE -> kwin, GNOME -> libei, else wlr
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#WAYLAND_DISPLAY=wayland-kde # headless-KDE appliance socket; retargeted per connect otherwise
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#XDG_CURRENT_DESKTOP=KDE
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# Optional overrides (apps.json is the primary mechanism for per-app settings):
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#PUNKTFUNK_FEC_PCT=20 # video FEC overhead percent
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#PUNKTFUNK_PERF=1 # per-stage timing logs
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#PUNKTFUNK_MDNS=0 # disable the mDNS adverts (native + GameStream) — for multicast-
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# dead networks/containers; clients add the host by address instead
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# Display-management policy (keep-alive · topology · conflict · identity · layout · max) is set in the
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# web console (Host → Virtual displays) → ~/.config/punktfunk/display-settings.json, NOT here; a
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# settings file supersedes the legacy PUNKTFUNK_MONITOR_LINGER_MS / _NO_ISOLATE / *_VIRTUAL_PRIMARY
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# knobs. One transport knob has no console equivalent:
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#PUNKTFUNK_IDLE_TIMEOUT_MS=8000 # disconnect-detection latency: how long before a DROPPED client is
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# declared gone (a kept display then starts its linger, or frees).
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# Lower (e.g. 3000) to reclaim kept displays sooner after an
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# ungraceful drop; clamped ≥1s, keep-alive ping scales with it so a
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# live session never false-disconnects. A deliberate quit is instant.
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# Session recovery hook: fired (debounced, ≥60 s apart) when a client connects while NO graphical
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# session is live for this uid — e.g. a compositor crash dropped the box to the GDM greeter, whose
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# auto-login only runs once per boot, so the box would otherwise need a walk-up login or a reboot.
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# Restarting the display manager re-runs auto-login and the client's retry lands in the recovered
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# desktop. Runs detached via `sh -c` as the host's user, so it needs passwordless privilege for
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# exactly this action (sudoers drop-in: `youruser ALL=(root) NOPASSWD: /usr/bin/systemctl restart
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# gdm`, or a polkit rule + plain `systemctl restart display-manager`). Unset = disabled.
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#PUNKTFUNK_RECOVER_SESSION_CMD=sudo -n systemctl restart gdm
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# Full-chroma 4:4:4 (HEVC Range Extensions) — sharper text/desktop, no chroma loss. Honored only on
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# the punktfunk/1 native path when the client advertises 4:4:4 AND the GPU supports it (probed; else
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# the session stays 4:2:0). HEVC-only; independent of 10-bit. NVENC (NVIDIA) is the validated path;
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# VAAPI/AMF/QSV decline (4:2:0). GameStream/Moonlight always stays 4:2:0.
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#PUNKTFUNK_444=1
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#PUNKTFUNK_10BIT=1 # HEVC Main10 / HDR (when the client advertises 10-bit)
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# Frame limiter for the GAME — how fast the compositor lets it render. Unset (or 0) = no limit,
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# the default. It does NOT cap the stream: the client still negotiates and receives its full rate,
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# because the encode loop re-encodes the held frame when the compositor produced no new one (an
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# almost-empty P-frame). So a 60-capped game on a 120 Hz session still sends 120 frames a second,
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# and the GPU time the game gives up goes to capture and encode instead — and to heat and battery
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# on a laptop or handheld.
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# gamescope only, today: it takes this as --nested-refresh, the rate it clamps the game to. That is
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# the nested output's rate, so everything gamescope composites moves at it. Other compositors have
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# no equivalent lever and ignore it.
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#PUNKTFUNK_MAX_FPS=60
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# Run the virtual display at a MULTIPLE of the session's frame rate, without sending a single
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# extra frame. A compositor paints on its own vblank, so a frame finished just after the capture
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# sampled waits nearly a whole interval to be picked up — the jittery part of the latency budget.
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# At 2 that worst case halves. Costs the compositor and GPU the extra composites, so it's opt-in;
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# 1 (default) is off, 4 is the ceiling. If the backend won't give the multiplied rate it reports
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# what it achieved and the stream paces to that, exactly as it would for any other refusal.
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#PUNKTFUNK_VDISPLAY_HZ_MULT=2
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#RUST_LOG=info
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# Management API bearer token. The mgmt API is HTTPS + token-authenticated ALWAYS (even on
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# loopback); if unset it is auto-generated + persisted to ~/.config/punktfunk/mgmt-token (which the
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# bundled web console sources). Set here only to pin a specific token.
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#PUNKTFUNK_MGMT_TOKEN=
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