On a headless KDE appliance the session has two outputs — run-headless-kde.sh's `kwin --virtual`
bootstrap (where plasmashell draws by default) and our per-session streamed output — so the client
saw only the wallpaper of an empty extended output (the KWin analogue of the GNOME/Mutter
VIRTUAL_PRIMARY issue). New opt-in PUNKTFUNK_KWIN_VIRTUAL_PRIMARY: after creating the virtual
output, set it primary via kscreen-doctor (KWin then re-homes the desktop onto it and disables the
bootstrap), then belt-and-suspenders disable anything still enabled. The keepalive re-enables the
bootstrap on teardown — though KWin also auto-re-enables it when our output is reclaimed, so there's
never a zero-output window. Set in packaging/kde/host.env. Verified live on the Fedora 44 KDE box:
mid-session the streamed output is the sole desktop at 0,0; post-session the bootstrap is back.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Three changes to make a reproducible Fedora KDE host install:
- ci/fedora-rpm.Dockerfile: parameterize the Fedora base (ARG FEDORA_VERSION, default 43) so the
same builder produces the Bazzite (F43, libavcodec.so.61) and Fedora 44 (libavcodec.so.62) RPMs.
A binary RPM is soname-coupled to its base, so each target Fedora needs its own build/channel.
- spec: install punktfunk-kde-session.service (was in the tree but never packaged) with its
ExecStart repointed from the dev source tree to the installed run-headless-kde.sh. This is the
headless `kwin --virtual` session (KWIN_WAYLAND_NO_PERMISSION_CHECKS=1) the kwin backend needs —
an interactive Plasma session refuses to hand its privileged zkde_screencast protocol to an
external client, so a dedicated session is required. Not enabled by default (kwin hosts opt in).
- ship packaging/kde/host.env as host.env.kde — the ready KWin appliance config (wayland-kde).
Validated live on a Fedora 44 KDE box (RTX 4090): KWin virtual output + zero-copy dmabuf->CUDA->NVENC.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler