https://bugs.kde.org/show_bug.cgi?id=464119
Bug ID: 464119
Summary: Systemd/logind sleep inhibitions inhibit both sleep
and screen locking.
Classification: Plasma
Product: Powerdevil
Version: 5.24.7
Platform: Ubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: vjorlikow...@gmail.com
CC: m...@ratijas.tk
Target Milestone: ---
SUMMARY
***
When attempting to force the system to stay awake while performing a background
activity - but *not* lock the screen - PowerDevil disables both sleep *and*
screen locking.
System was upgraded from KUbuntu 20.04 to KUbuntu 22.04.
I expect that this is an unintended consequence of this commit:
https://invent.kde.org/plasma/powerdevil/-/commit/b5dfb286a4d9b43ac74862218beb5dd7f58ea7a8
***
STEPS TO REPRODUCE
1. On a laptop (or other system that can suspend) - set up screen auto-lock, to
occur after some number of minutes (1-5).
2. In a terminal, execute: systemd-inhibit --who="test sleep" --what="sleep"
--why="testing sleep without screen lock" sleep infinity
3. The PowerDevil plasmoid will report that both sleep and screen locking are
being blocked - and automatic screen locking will not take place (even though
the requested inhibition should *only* prevent sleep, not automatic screen
locking).
OBSERVED RESULT
Screen auto-lock does not lock, when systemd/logind inhibition requested is for
"sleep" only, not "sleep:idle".
EXPECTED RESULT
Screen should auto-lock, after configured duration, when systemd/logind
inhibition is requested for "sleep" only.
Screen should not auto-lock for an inhibition containing "idle".
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma: KUbuntu 22.04
(available in About System)
KDE Plasma Version: 5.24.7
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
ADDITIONAL INFORMATION
This behavior *also* occurs outside of systemd/logind, by using the dbus
interface.
The following python program causes the same misbehavior on the part of
Powerdevil:
import time
from PyQt5.QtCore import QMetaType
from PyQt5.QtDBus import QDBusConnection, QDBusInterface, QDBusArgument
sessionbus = QDBusConnection.sessionBus()
iface = QDBusInterface("org.kde.Solid.PowerManagement.PolicyAgent",
"/org/kde/Solid/PowerManagement/PolicyAgent",
"org.kde.Solid.PowerManagement.PolicyAgent", sessionbus)
a1 = QDBusArgument(1, QMetaType.UInt)
a2 = QDBusArgument('test', QMetaType.QString)
a3 = QDBusArgument('test sleep', QMetaType.QString)
c = iface.call('AddInhibition', a1, a2, a3)
print(c.arguments())
print('Sleeping 15 minutes, unless interrupted...')
time.sleep(900)
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