https://bugs.kde.org/show_bug.cgi?id=423535

            Bug ID: 423535
           Summary: Plasma 5.1.2 blank screen after plasma splash screen
           Product: KScreen
           Version: 5.19.2
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: libkscreen
          Assignee: kscreen-bugs-n...@kde.org
          Reporter: qurbanul...@gmail.com
  Target Milestone: ---

Created attachment 129690
  --> https://bugs.kde.org/attachment.cgi?id=129690&action=edit
Plasam blank screen journald log file

SUMMARY
I upgraded the plasma from 5.19.1 to 5.19.2 by compiling. Live image of Plasma
5.19.1 was working good but Live image of Plasma 5.19.2 displays blank screen
after plasma splash screen. Blank screen happen in both QEMU with -vga std, qxl
and on Dell M3800 and other systems with Intel quad core processor.

STEPS TO REPRODUCE
1. Compiled Plasma 5.19.2, Framework 5.71.0
2. Make live boot image
3. 

OBSERVED RESULT
I think the fault is in these line of journald logs:

Jun 26 14:10:57 avouchlive systemd[1051]: Started Bluetooth OBEX service.
Jun 26 14:10:57 avouchlive kernel: Bluetooth: RFCOMM TTY layer initialized
Jun 26 14:10:57 avouchlive kernel: Bluetooth: RFCOMM socket layer initialized
Jun 26 14:10:57 avouchlive kernel: Bluetooth: RFCOMM ver 1.11
Jun 26 14:10:57 avouchlive kded5[1124]: ktp-kded-module: "auto-away" state
change: TelepathyKDEDModulePlugin::Enabled
Jun 26 14:10:57 avouchlive kded5[1124]: QObject::connect: No such signal
QDBusAbstractInterface::ActiveChanged(bool)
Jun 26 14:10:57 avouchlive kded5[1124]: ktp-kded-module: "screen-saver-away"
state change: TelepathyKDEDModulePlugin::Enabled
Jun 26 14:10:57 avouchlive kded5[1124]: QSqlQuery::value: not positioned on a
valid record
Jun 26 14:10:57 avouchlive dbus-daemon[1080]: [session uid=1000 pid=1080]
Successfully activated service
'org.freedesktop.Telepathy.Client.KTp.KdedIntegrationModule'
Jun 26 14:10:57 avouchlive kded5[1124]: bluedevil: ObexManager operational
changed true
Jun 26 14:10:57 avouchlive kded5[1124]: bluedevil: ObexAgent registered
Jun 26 14:10:57 avouchlive dbus-daemon[976]: [system] Successfully activated
service 'org.freedesktop.UPower'
Jun 26 14:10:57 avouchlive systemd[1]: Started Daemon for power management.
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:
XRandR::setConfig
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:
Requested screen size is QSize(1920, 1080)
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:
Needed CRTCs:  1
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:
Actions to perform: 
                                                                    Primary
Output: false
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:     
   Change Screen Size: false
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:     
   Disable outputs: false
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:     
   Change outputs: true
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:     
            (66)
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:     
   Enable outputs: false
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:
RRSetCrtcConfig (change output) 
                                                                    Output: 66
( "eDP-1" ) 
                                                                    CRTC: 63 
                                                                    Pos:
QPoint(0,0) 
                                                                    Mode: 71
KScreen::Mode(Id: "71" , Size: QSize(1920, 1080) @ 60.0495 ) 
                                                                    Rotation: 1
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:     
   Result:  0
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:
XRandROutput 66 update 
                                                                   
m_connected: 0 
                                                                    m_crtc
XRandRCrtc(0x559ea04ec820) 
                                                                    CRTC: 63 
                                                                    MODE: 71 
                                                                    Connection:
0 
                                                                    Primary:
true
Jun 26 14:10:57 avouchlive kscreen_backend_launcher[1207]: kscreen.xrandr:
XRandR::setConfig done!
Jun 26 14:11:00 avouchlive ksmserver[1257]: Qt: Session management error:
networkIdsList argument is NULL
Jun 26 14:11:00 avouchlive kcminit_startup[1118]: Initializing  "kded_touchpad"
:  "kcminit_touchpad"
Jun 26 14:11:00 avouchlive kcminit_startup[1118]: kcm_touchpad: Using X11
backend
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/kaccess.desktop"
("/usr/bin/kaccess")
Jun 26 14:11:00 avouchlive kcminit_startup[1118]: Initializing  "kcm_kgamma" : 
"kcminit_kgamma"
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/pam_kwallet_init.desktop"
("/usr/lib/pam_kwallet_init")
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service 
"/etc/xdg/autostart/polkit-kde-authentication-agent-1.desktop"
("/usr/lib/polkit-kde-authentication-agent-1")
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/baloo_file.desktop"
("/usr/bin/baloo_file")
Jun 26 14:11:00 avouchlive kaccess[1267]: Xlib XKB extension major= 1  minor= 0
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/org.kde.plasmashell.desktop"
("/usr/bin/plasmashell")
Jun 26 14:11:00 avouchlive kaccess[1267]: X server XKB extension major= 1 
minor= 0
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/xembedsniproxy.desktop"
("/usr/bin/xembedsniproxy")
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/kwrited-autostart.desktop"
("/usr/bin/kwrited")
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service 
"/etc/xdg/autostart/org.kde.discover.notifier.desktop"
("/usr/lib/DiscoverNotifier")
Jun 26 14:11:00 avouchlive polkit-kde-authentication-agent-1[1271]: New
PolkitAgentListener  0x562cd19eaa00
Jun 26 14:11:00 avouchlive polkit-kde-authentication-agent-1[1271]: Adding new
listener  PolkitQt1::Agent::Listener(0x562cd19fb630) for  0x562cd19eaa00
Jun 26 14:11:00 avouchlive polkit-kde-authentication-agent-1[1271]: Listener
online
Jun 26 14:11:00 avouchlive polkitd[978]: Registered Authentication Agent for
unix-session:1 (system bus name :1.25
[/usr/lib/polkit-kde-authentication-agent-1], object path
/org/kde/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8)
Jun 26 14:11:00 avouchlive polkit-kde-authentication-agent-1[1271]:
Authentication agent result: true
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/gmenudbusmenuproxy.desktop"
("/usr/bin/gmenudbusmenuproxy")
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/pulseaudio.desktop"
("/usr/bin/start-pulseaudio-x11")
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/powerdevil.desktop"
("/usr/lib/org_kde_powerdevil")
Jun 26 14:11:00 avouchlive plasma_session[1098]: org.kde.plasma.session:
Starting autostart service  "/etc/xdg/autostart/org.kde.korgac.desktop"
("/usr/bin/korgac")
Jun 26 14:11:00 avouchlive dbus-daemon[976]: [system] Activating via systemd:
service name='org.freedesktop.UDisks2' unit='udisks2.service' requested by
':1.26' (uid=1000 pid=1276 comm="/usr/bin/baloo_file "
label="system_u:system_r:kernel_t")
Jun 26 14:11:00 avouchlive systemd[1]: Condition check resulted in FUSE Control
File System being skipped.
Jun 26 14:11:00 avouchlive systemd[1]: Condition check resulted in Set Up
Additional Binary Formats being skipped.
Jun 26 14:11:00 avouchlive systemd[1]: Condition check resulted in Store a
System Token in an EFI Variable being skipped.
Jun 26 14:11:00 avouchlive systemd[1]: Condition check resulted in First Boot
Wizard being skipped.
Jun 26 14:11:00 avouchlive systemd[1]: Condition check resulted in Commit a
transient machine-id on disk being skipped.
Jun 26 14:11:00 avouchlive systemd[1]: Starting Disk Manager...


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Avouch (build from scratch)
(available in About System)
KDE Plasma Version: 5.19.2
KDE Frameworks Version: 5.71.0
Qt Version: 5.15.0

ADDITIONAL INFORMATION

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