https://bugs.kde.org/show_bug.cgi?id=498003
Bug ID: 498003
Summary: Desktop shows briefly before lock scren as laptops
wake up from S3/S0ix
Classification: Plasma
Product: plasmashell
Version: 6.2.4
Platform: Other
OS: Linux
Status: REPORTED
Severity: critical
Priority: NOR
Component: Screen locking
Assignee: plasma-b...@kde.org
Reporter: jeff...@aosc.io
Target Milestone: 1.0
With Plasma 6 (since at least 6.2, when I upgraded), the lock screen only
displays with a second-long delay (potentially longer when battery is low) when
I open my laptop's lid (waking up from suspend). During this interval, KDE
shows a *live* desktop as though the screen was not locked and only switches
back to the lock screen after that delay. This issue is only reproducible on
X11.
This seems like a pretty severe security risk? It would only take enough tries
for my desktop to become vulnerable. For your reference, this issue had been
found in GNOME and MATE before:
- https://bugs.launchpad.net/ubuntu/+source/unity-2d/+bug/830348
- https://github.com/mate-desktop/mate-screensaver/issues/145
Only on Plasma, the delay can be much longer before the lock screen was shown.
I have filmed this behaviour to better explain what I mean.
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