The Xwayland-DISPLAY poll did `d=$(pgrep -a Xwayland | grep … | head -1)`, but
under `set -euo pipefail` pgrep/grep exit non-zero when Xwayland isn't running,
so the command substitution failed and `set -e` aborted the WHOLE script —
killing KWin with it — on the loop's first iteration instead of polling.
It only ever worked when launched from an interactive shell where Xwayland
happened to already be up (so pgrep matched on try 1). Under the systemd boot
appliance (punktfunk-kde-session.service) Xwayland isn't up that early, so the
session crash-looped (restart counter climbing, KWin never staying), the host
had no compositor, and clients couldn't connect.
Append `|| true` to the substitution so the loop polls as intended and a session
with no Xwayland at all still proceeds (DISPLAY just stays unset → warn).
Verified live: the unit now stays active (0 restarts), KWin + the wayland-kde
socket persist, probe-compositor reports ready, and a real client session
captured 4.8 MB of H.265 off the running serve --native host.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
A full Plasma login starts several pieces our bare headless session was missing, which
surfaced as three separate failures while streaming the KDE desktop:
- Steam (and other X11 apps) failed "can't open display": Xwayland runs, but KWin only
sets DISPLAY for its own children — apps launched via the plasma menu / D-Bus activation
never saw it. Detect the Xwayland display after KWin is ready and export it into the
systemd/D-Bus activation environment.
- Discover / PackageKit couldn't install apps: polkitd (the policy engine) was running but
no authentication *agent* (the prompt) was — so privileged installs got no authorization.
Start polkit-kde-authentication-agent-1 (forcing the Qt Wayland platform, or it exits).
- The streamed desktop showed app windows but no wallpaper/panels: plasmashell had crashed
and the old unsupervised `plasmashell &` never brought it back. Supervise it — restart for
as long as KWin lives, so the desktop shell self-heals.
Validated live on this box: DISPLAY=:0 now in the --user environment (xdpyinfo on :0 works),
the polkit agent registers ("Listener online"), and plasmashell stays up under the supervisor.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
A synchronous systemctl try-restart of the portal chain (xdg-desktop-portal is Type=dbus,
waits for its bus name) blocked the script ~30-40s before plasmashell started. --no-block
queues the restart and returns immediately — the portal only needs to be ready before the
first client streams (seconds later), not before plasmashell. Validated: plasmashell up in
1s (was ~30s); a virtual capture session against the fresh session streamed 720/720 frames
@720p120, zero-copy CUDA, no black screen.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Headless KDE startup was a chain of timing-sensitive handoffs gated by a blind `sleep 2`,
the dominant source of black screens. Phase-1 fixes:
- New `punktfunk-host probe-compositor` subcommand: exits 0 iff the detected compositor is
up AND ready to create a virtual output now. KWin gets a real check (connect + registry
roundtrip + the privileged zkde_screencast global must be advertised — what the backend
needs); gamescope/Mutter/wlroots create on demand so the probe just confirms Linux.
(vdisplay::probe dispatcher + kwin::probe; reuses kwin.rs's existing roundtrip path.)
- run-headless-kde.sh: replace `sleep 2` with an active readiness wait (poll probe-compositor
until ready, 30s deadline, and bail with kwin's log if kwin_wayland exits during init).
Move the portal restart to AFTER readiness, and precede it with `systemctl --user
import-environment` + `dbus-update-activation-environment` (the missing env import — the
Sway script does this; without it a restarted portal inherits a stale/empty WAYLAND_DISPLAY,
which is the "streams but eats no input/audio" failure). kwin's stderr → a log file.
Validated: probe-compositor exits 0 "Kwin ready" against the live session, exit 1 with a
clear diagnostic when the compositor is absent. 114 tests green, clippy/fmt clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The portal processes bind to the compositor that existed when they started; after a kwin
restart the stale instances point at a dead socket and RemoteDesktop/EIS input injection
times out ("EIS setup timed out"). Hit live: a fresh session streamed fine but ate no
mouse/keyboard until the portals were restarted.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Full project rename, decided 2026-06-10:
- Crates/binaries: punktfunk-core / punktfunk-host / punktfunk-client-rs.
- C ABI: punktfunk_* symbols, Punktfunk* types, include/punktfunk_core.h,
PUNKTFUNK_FEATURE_QUIC guard (header regenerated; cbindgen renames updated, incl.
PUNKTFUNK_BTN_*/PUNKTFUNK_AXIS_* wire constants).
- Protocol: punktfunk/1 — control-plane magic LMN1 → PKF1, nonce salt lmn1 → pkf1.
WIRE BREAK: clients must be rebuilt from this revision.
- Env knobs: PUNKTFUNK_VIDEO_SOURCE / PUNKTFUNK_COMPOSITOR / PUNKTFUNK_ZEROCOPY / ….
- Host config dir: ~/.config/punktfunk (the box's dir was migrated in place — the
persistent identity is unchanged, pinned fingerprints stay valid).
- Swift package: PunktfunkKit + PunktfunkCore.xcframework + PunktfunkConnection
(Sources/PunktfunkClient app + tests renamed with it); build-xcframework.sh updated.
- scripts/: 60-punktfunk.rules, punktfunk-host.service; OpenAPI doc regenerated.
Also: scripts/headless/run-headless-kde.sh — full headless Plasma bringup. Root cause of
"desktop but no apps/settings" over the stream: plasmashell launched without
XDG_MENU_PREFIX=plasma-, so the launcher resolved a nonexistent applications.menu and
rendered an empty menu. The script sets the complete KDE session env (menu prefix,
KDE_FULL_SESSION, session version) and rebuilds ksycoca before starting plasmashell.
Gate: 97/97 tests, clippy -D warnings (both feature sets), fmt, C-ABI harness PASS,
zero lumen references left outside .git.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler