https://bugs.kde.org/show_bug.cgi?id=455738

            Bug ID: 455738
           Summary: KScreenLocker with black screen after some minutes in
                    sleep
           Product: kscreenlocker
           Version: 5.25.1
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: greeter
          Assignee: plasma-b...@kde.org
          Reporter: higor...@gmail.com
                CC: bhus...@gmail.com
  Target Milestone: ---

Hello everyone

KScreenLocker shows black screen after some minutes of sleep (laptop). It's not
showing nothing (any icon, cursor, nothing), even if I login from tty2 (CTRL +
ALT + F2). It's not happens everytime, only in random times. I've searched
around my journalctl and found this errors:

jun 21 13:21:46 pinguim kscreenlocker_greet[13691]: Qt: Session management
error: networkIdsList argument is NULL
jun 21 13:21:47 pinguim kscreenlocker_greet[13691]:
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/>
jun 21 13:21:47 pinguim kscreenlocker_greet[13691]:
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/>
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]:
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/>
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]:
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/>
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]:
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/>
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim plasmashell[9763]: QXcbClipboard::setMimeData: Cannot
set X11 selection owner
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim plasmashell[9763]: QXcbClipboard::setMimeData: Cannot
set X11 selection owner
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old
jun 21 13:21:48 pinguim kscreenlocker_greet[13691]: QXcbClipboard:
SelectionRequest too old

I tried to run '/usr/lib/kscreenlocker_greet --testing', but it's everything
fine (As I've said, the black screen thing happens randomly) with some minors
errors:

file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/components/VirtualKeyboard.qml:8:1:
module "QtQuick.VirtualKeyboard" is not installed
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/LockScreenUi.qml:222:
ReferenceError: wallpaper is not defined
Locked at 1655831997
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/components/UserList.qml:43:9:
Unable to assign [undefined] to bool 



SOFTWARE/OS VERSIONS
Linux: Arch Linux x86_64 - Kernel 5.18.5-arch1-1
KDE Plasma Version: Plasma 5.25.1
KDE Frameworks Version: 5.95.0
Qt Version: 5.15.5

ADDITIONAL INFORMATION
It's happens in both X11 and Wayland sessions

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