enricobuehlerandClaude Fable 5
19392918ff
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Field report (RX 5700 / SteamOS): 10-bit HEVC "unsupported" — but the GPU was
never the blocker (RADV probed Main10 fine on that box). The session stayed SDR
because stock gamescope offers no 10-bit PQ capture formats and nothing shipped
our pipewire-hdr build outside the Bazzite sysext, while PUNKTFUNK_GAMESCOPE_HDR
additionally defaulted off everywhere. Close all three gaps:
- PUNKTFUNK_GAMESCOPE_HDR now defaults ON (explicit-off grammar, the flip the
config comment planned post-canary). Safe by construction: the +pfhdr banner
probe, managed-spawn term, and client 10-bit cap keep stock-gamescope boxes on
the exact 8-bit path. The nix module's gamescopeHdr (default true now) only
controls whether the patched binary is on PATH; it no longer sets the env.
- SteamOS: new scripts/steamdeck/build-gamescope.sh builds the HDR gamescope in
the same pf2 trixie distrobox (apt dep list validated by a full build in a
debian:trixie container), installs ~/.local/bin/punktfunk-gamescope, and
maintains PUNKTFUNK_GAMESCOPE_BIN in host.env ONLY while the binary passes its
on-glass --version/+pfhdr check — a stale absolute override would break
session spawning, not just HDR. Wired into install.sh (§3b), update.sh
(retrofit), and rebuild-check.sh (ldd-probes it like the host binary).
- Arch: build-sysext.sh gains a --gamescope fold-in (banner-verified by
execution, host-image-only), and punktfunk-host optdepends the companion.
Deliberately NO CI-published host sysext: per the 2026-07-22 packaging
verdict a prebuilt SteamOS host breaks on A/B soname bumps (and /var is
per-partition-set), so arch.yml records that instead — SteamOS hosts use the
distrobox flow above.
Also fixes a latent bug that made build-sysext.sh fail every invocation as
documented: a literal `}` inside `${1:?usage …{host,client}…}` terminates the
expansion early and corrupts $PKG (caught by the new synthetic-package test,
which also covers the fold-in, the unmarked-gamescope refusal, and the
client-image guard).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
57 lines
3.4 KiB
Bash
57 lines
3.4 KiB
Bash
# punktfunk host config for Bazzite (~/.config/punktfunk/host.env).
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#
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# The compositor + input backend are AUTO-DETECTED per connect from the ACTIVE session: the host
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# follows the box as you flip between Steam Gaming Mode (gamescope — a managed session at the
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# CLIENT's resolution) and a KDE/GNOME Desktop (KWin/Mutter virtual output at the client's mode).
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# So nothing here forces a backend, and no session anchors are needed: a `systemctl --user`
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# service inherits the correct XDG_RUNTIME_DIR and the host derives the bus from it. (Keys are
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# CASE-SENSITIVE — use the exact uppercase names.)
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PUNKTFUNK_VIDEO_SOURCE=virtual
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# GPU zero-copy capture (dmabuf -> CUDA -> NVENC) is ON by default and auto-falls back to CPU if
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# unavailable. 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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#RUST_LOG=info
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# --- Optional overrides (default is active-session auto-detection) ---
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# Force a specific backend for testing (skips auto-detect + env retargeting):
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# PUNKTFUNK_COMPOSITOR=kwin|mutter|wlroots|gamescope
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# PUNKTFUNK_INPUT_BACKEND=libei|wlr|gamescope|uinput
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#
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# GAME MODE = ATTACH (the box owns its session; the host follows). The box decides whether it's in
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# Steam Gaming Mode or a Desktop — you switch with the normal Steam UI / "Switch to Desktop". The
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# host just ATTACHES to whatever's live and captures it; it never tears the session down. So
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# switching Desktop<->Game is rock-solid, and when you disconnect the box STAYS in its current
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# mode — reconnecting drops you right back where you were. On a resolution mismatch the host
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# restarts the box's own game-mode session at the CLIENT's resolution (a foreign/bare gamescope
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# instead streams at its own mode).
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PUNKTFUNK_GAMESCOPE_ATTACH=1
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#
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# Opt OUT to the MANAGED model instead (host tears the box's gamescope down on connect and launches
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# its OWN at the CLIENT's exact resolution; restores on a debounced idle). Client-mode-following, but
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# it does not coexist with a box-owned game-mode session — pick one:
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# PUNKTFUNK_GAMESCOPE_MANAGED=1 # (and remove PUNKTFUNK_GAMESCOPE_ATTACH above)
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#
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# Follow a Gaming<->Desktop switch MID-STREAM (rebuild the backend in place, no reconnect). This is
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# ON BY DEFAULT on Bazzite/SteamOS (the host detects the platform); set =0 to disable it:
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# PUNKTFUNK_SESSION_WATCH=0
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#
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# HDR (10-bit BT.2020 PQ) on the gamescope path. Needs `punktfunk-gamescope` — gamescope plus the
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# patch that teaches its capture node the 10-bit formats — which the sysext ships alongside the
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# host; it does NOT replace the system gamescope. ON by default when that binary is present; a
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# host without it stays SDR either way. `punktfunk-host hdr-probe` says what it found. To force
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# SDR on the gamescope backend:
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# PUNKTFUNK_GAMESCOPE_HDR=0
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#
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# On an HDR session, how bright SDR content (desktop, Steam overlay, SDR games) is inside the PQ
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# container. gamescope's default is 400 nits; raise it if whites look dim on your TV.
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# PUNKTFUNK_GAMESCOPE_SDR_NITS=400
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#
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# HEADLESS GAME MODE: on a box with no display attached, Bazzite's "Switch to Game Mode" normally
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# crashes (gamescope's DRM backend has no panel to drive). The host package ships
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# /etc/gamescope-session-plus/sessions.d/steam, which auto-falls-back to gamescope's HEADLESS backend
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# when no display is connected — so game mode boots offscreen and streams, with no config here. It's a
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# no-op on display-attached boxes. (The host then auto-detects Gaming and streams it.)
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