https://bugs.kde.org/show_bug.cgi?id=391858
Bug ID: 391858
Summary: KDE screengrabs login screen, then uses it in Compiz
cube background
Product: kwin
Version: 5.8.7
Platform: Mageia RPMs
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: compositing
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Clean install: Mageia 6, KDE Plasma 5.8.7, Frameworks 5.32.0, x86_64.
What appears to happen, is that when you login, KDE takes a screenshot of the
login page, complete with the number of dots you used for your password (if
it's shorter than the field length - tested that on clean test profile).
When you use Compiz with the cube display, middle clicking the desktop to show
the cube, you are shown the screenshot of the login screen behind whatever
image you are using as a desktop image (you need to change opacity in Compiz to
prove it).
This should not happen, KDE should not be taking a screenshot, nor adding it as
a background to the cube. If you change Compiz transparency of the cube, you
can see the login screen screenshot. If the cube is 100% transparent, you
should see the "skydome" behind the applications running and cube, instead, you
see the KDE login screenshot.
When you logout / reboot, you are also flashed up the screenshot of the KDE
login screen before being kicked to terminal display of shutdown.
This is on a clean install, and also reproducible on a clean / new user
creation.
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