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feat(packaging/bazzite): one-shot KDE Desktop-mode setup for the host

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The session-aware selector drives a KWin virtual output at the client's
resolution when the Bazzite box is in KDE Desktop Mode — validated live. But a
normal KDE login withholds two things the headless host needs:
  1. KWIN_WAYLAND_NO_PERMISSION_CHECKS=1 — so KWin exposes the privileged
     zkde_screencast virtual-output protocol to an external client.
  2. the kde-authorized RemoteDesktop grant — so libei input auto-approves
     instead of popping a dialog a headless host can't answer.

Add packaging/bazzite/kde-desktop-setup.sh (idempotent, no root): writes the
environment.d KWIN drop-in and seeds the grant DB (shipped at
/usr/share/punktfunk/headless/kde-authorized) into ~/.local/share/flatpak/db/,
restarting the portal chain. Ship it via the RPM at
/usr/share/punktfunk/bazzite/ and document it in the Bazzite README (new §6.5).
Gaming Mode needs none of this (auto-attach).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Enrico Bühler
2026-06-14 22:26:21 +00:00
parent ce8ac9755f
commit c7959f588d
3 changed files with 73 additions and 0 deletions
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packaging/bazzite/README.md
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@@ -291,6 +291,28 @@ sudo firewall-cmd --permanent --add-port=9777/udp && sudo firewall-cmd --reload
---
## 6.5 Desktop (KDE) mode — stream the desktop at the client's resolution (optional)
The host **auto-detects** the live session per connect: in **Steam Gaming Mode** it attaches to the
running gamescope (no setup); switch the box to the **KDE Desktop** and it drives a KWin *virtual
output at the connecting client's exact resolution* (no TV-stretch, churn-free). The Desktop path
needs one one-shot setup the first time, because a normal KDE login withholds two things the
headless host needs — the privileged `zkde_screencast` virtual-output protocol, and an
auto-approved RemoteDesktop input grant:
```sh
bash /usr/share/punktfunk/bazzite/kde-desktop-setup.sh
# then log out + back into the KDE Desktop session once (or reboot) so KWin restarts with the flag
```
That writes `~/.config/environment.d/10-punktfunk-kwin.conf`
(`KWIN_WAYLAND_NO_PERMISSION_CHECKS=1`) and seeds the `kde-authorized` RemoteDesktop grant into
`~/.local/share/flatpak/db/`. Gaming Mode is unaffected. To connect from Desktop Mode, switch to it
(Steam → Power → Switch to Desktop), then connect the client; switching **mid-stream** requires a
reconnect (the host resolves the backend per connect).
---
## 7. Verify it's working
**1. Watch the startup log:**