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Classroom_Desktop/config/plasma/xdg/powermanagementprofilesrc
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ekklesiaandClaude Opus 5 926668dc9b fix: make an existing classroom converge into the Plasma appliance
A real room upgraded to 0.1.45 and came up as stock Debian Plasma with
the old Waybar across the top, mako still catching notifications, and a
lock screen on an account that has no password.

The cause was one line, and it was in the lab: the harness handed the
session under test XDG_CONFIG_DIRS by hand, so every result it had ever
produced was a result about a machine somebody had already configured.
On a machine SDDM starts the session through PAM, PAM does not read
/etc/environment.d, and Debian's own plasma-workspace env.sh then set the
variable from scratch — so the classroom's settings directory was not in
the cascade at all. No layout, no lock policy, no Kiosk restrictions.

The settings now arrive the way Plasma delivers them, through a file in
/etc/xdg/plasma-workspace/env. Around that: the look and feel is
immutable on its own key so a stale profile cannot answer for it; the
palette is composed into the package, because naming a colour scheme does
not produce one and the dark bar had been coming from a technician's
hand; the desktop reset converges another desktop's appearance state and
keeps the room's own; and classroom-migrate stops, deactivates and masks
the old shell, including the D-Bus activation that brought mako back
while the panel was down — found only by killing the panel on a migrated
machine.

device.conf loses COMPOSITOR and comes off the hyprland channel, which
would otherwise have handed the room the experiment back.

The lab stops flattering the package: it restarts the machine, lets SDDM
actually autologin, and asks a fresh install and a machine upgraded from
the Hyprland package the same sixty questions. Both answer identically,
twice, and the panel still comes back from eight SIGKILLs.

Co-Authored-By: Claude Opus 5 <[email protected]>
2026-09-10 23:06:56 -05:00

49 lines
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# The classroom never sleeps, never dims, and never locks.
#
# Two failures on real hardware are behind this file. The power button put
# a room to sleep; and a machine left alone came back to a password prompt
# on an account that is meant to have no password, which strands the
# television until somebody arrives with SSH.
#
# PowerDevil decides all of it. It also takes logind's handle-power-key
# inhibitor while a session is running, so the logind drop-in on its own
# would be overruled by whatever this says.
#
# Every profile is marked immutable at the profile level, not just on the
# subgroups. PowerDevil loads an idle action only when the profile has a
# group for it, so what matters here is as much what is absent — no
# DimDisplay, no DPMSControl, no SuspendSession — as what is present, and
# a writable profile is one a leftover user file can add those back to.
# classroom-desktop-reset removes the user's copy at every login for the
# same reason.
#
# Every profile gets the same answer. A classroom machine has no battery,
# but a profile that exists and disagrees is worse than one that does not
# exist at all.
#
# 0 is no action.
[AC][$i]
icon=battery-charging
[AC][HandleButtonEvents][$i]
powerButtonAction=0
lidAction=0
triggerLidActionWhenExternalMonitorPresent=false
[Battery][$i]
icon=battery-060
[Battery][HandleButtonEvents][$i]
powerButtonAction=0
lidAction=0
triggerLidActionWhenExternalMonitorPresent=false
[LowBattery][$i]
icon=battery-low
[LowBattery][HandleButtonEvents][$i]
powerButtonAction=0
lidAction=0
triggerLidActionWhenExternalMonitorPresent=false