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fix: a notification's Configure button no longer opens system settings

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The kernel memory killer's "Memory Shortage Avoided" notice carried a
Configure button that ran kcmshell6 and opened KDE's whole Notifications
settings under the teacher's account. Reproduced in the lab.

Plasma draws that button without consulting the Kiosk policy, but
kcmshell6 and System Settings do: every settings module Debian 13's
Plasma 6.3 installs (90) is now refused in the classroom's immutable
kdeglobals, so the same click shows only "disabled by the system
administrator". The clock's Configure Digital Clock goes with
plasma/allow_configure_when_locked=false; Configure Audio Devices
disappears on its own; the disabled window's Help button opened KDE Help
Center, which the package now conflicts with (plasma-desktop only
recommends it).

The maintenance terminal runs outside the classroom's configuration and
still opens every module, verified. converged-check fails if any module
on a machine is ever left unrestricted: 126 passed in the lab.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
This commit is contained in:
ekklesia
2026-09-24 06:59:53 -05:00
co-authored by Claude Opus 5.5
parent 3855989029
commit cd798a33a1
9 changed files with 194 additions and 1 deletions
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packaging/debian/control.template
+7 -1
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@@ -6,7 +6,7 @@ Architecture: amd64
Maintainer: Ekklesia
Depends: pkexec, polkit-kde-agent-1, plasma-desktop, plasma-workspace, kwin-wayland, plasma-nm, plasma-pa, plasma-widgets-addons, konsole, sddm, dbus-user-session, xwayland, fonts-dejavu, fonts-noto, network-manager, pipewire, pipewire-audio, wireplumber, pulseaudio-utils, cups, cups-client, cups-filters, foomatic-db-compressed-ppds, python3-gi, python3-gi-cairo, gir1.2-gtk-3.0, gir1.2-gtklayershell-0.1, libnotify-bin, curl, gnupg, ca-certificates, python3-paho-mqtt, python3-pyqt6.qtwebengine, python3-pyqt6, libreoffice-impress, libreoffice-core, poppler-utils, fonts-liberation, fonts-liberation-sans-narrow, fonts-croscore, fonts-crosextra-carlito, fonts-crosextra-caladea, fonts-urw-base35, fonts-roboto, fonts-open-sans, fonts-lato, fonts-montserrat, fonts-noto-extra
Recommends: vlc
Conflicts: plasma-welcome, plasma-discover, kdeconnect, kup-backup
Conflicts: plasma-welcome, plasma-discover, kdeconnect, kup-backup, khelpcenter
Description: Ekklesia managed classroom environment
A classroom appliance built on Debian's own Plasma desktop. The room's
panel, window behaviour, notifications, palette and lockdown are
@@ -61,3 +61,9 @@ Description: Ekklesia managed classroom environment
The Conflicts line is deliberate. A welcome tour, a software centre and
a phone pairing daemon are all things plasma-desktop recommends and a
room a teacher walks into should not have.
.
khelpcenter is there for the same reason, found the hard way: a
settings window's Help button opens it directly, whatever the Kiosk
restrictions say, and it is a browser of the machine's manual pages with
file dialogs of its own. plasma-desktop only recommends it, and nothing
else installed needs it.