https://bugs.kde.org/show_bug.cgi?id=453117

            Bug ID: 453117
           Summary: Crashed when one of two-monitor setup has turn off and
                    on multiple times (maybe hardware problem)
           Product: kwin
           Version: 5.24.4
          Platform: openSUSE RPMs
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: kwin-bugs-n...@kde.org
          Reporter: alexzander.mosche...@gmail.com
  Target Milestone: ---

Application: kwin_x11 (5.24.4)

Qt Version: 5.15.2
Frameworks Version: 5.93.0
Operating System: Linux 5.17.4-1-default x86_64
Windowing System: X11
Distribution: openSUSE Tumbleweed
DrKonqi: 5.24.4 [KCrashBackend]

-- Information about the crash:
preambula: i am has lenovo thinkcentre m75q and two monitor - one connected via
dsub and other via hdmi.  time to time hdmi connected monitor has going black.
switching the activity or virtual desktop several time helps to revive the
monitor.
ambula: i come to work, turn on monitors and noticed that all windows placed on
the first one while second is black. me swithed activity several times while
monitor become usable and kwin crash message appear.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Content of s_kcrashErrorMessage: std::unique_ptr<char []> = {get() = <optimized
out>}
[KCrash Handler]
#6  0x00007f605cf895bc in KWin::Toplevel::isOnOutput (this=0x56305d03ea20,
output=0x56305c4ca9b0) at
/usr/src/debug/kwin5-5.24.4-1.1.x86_64/src/toplevel.cpp:423
#7  0x00007f605cfc1b49 in KWin::Workspace::activeOutput (this=0x56305c37b570)
at /usr/src/debug/kwin5-5.24.4-1.1.x86_64/src/workspace.cpp:2419
#8  0x00007f605cfcec7f in KWin::X11Client::manage (this=0x56305c03dc30,
w=<optimized out>, isMapped=<optimized out>) at
/usr/src/debug/kwin5-5.24.4-1.1.x86_64/src/workspace.h:811
#9  0x00007f605cfb4863 in KWin::Workspace::createClient (this=0x56305c37b570,
w=41946801, is_mapped=<optimized out>) at
/usr/src/debug/kwin5-5.24.4-1.1.x86_64/src/workspace.cpp:654
#10 0x00007f605ceecb4d in KWin::Workspace::workspaceEvent (this=0x56305c37b570,
e=0x7f605003a420) at /usr/src/debug/kwin5-5.24.4-1.1.x86_64/src/events.cpp:223
#11 0x00007f605b3d70ef in QAbstractEventDispatcher::filterNativeEvent
(this=<optimized out>, eventType=..., message=message@entry=0x7f605003a420,
result=result@entry=0x7ffeb4d58788) at kernel/qabstracteventdispatcher.cpp:495
#12 0x00007f60557b04a1 in QXcbConnection::handleXcbEvent
(this=this@entry=0x56305bfeb250, event=event@entry=0x7f605003a420) at
qxcbconnection.cpp:536
#13 0x00007f60557b1ba6 in QXcbConnection::processXcbEvents
(this=0x56305bfeb250, flags=...) at qxcbconnection.cpp:1020
#14 0x00007f60557d824c in QXcbUnixEventDispatcher::processEvents
(this=0x56305c126030, flags=...) at qxcbeventdispatcher.cpp:61
#15 0x00007f605b3d855b in QEventLoop::exec (this=this@entry=0x7ffeb4d588d0,
flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:69
#16 0x00007f605b3e0820 in QCoreApplication::exec () at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#17 0x00007f605b82a61c in QGuiApplication::exec () at
kernel/qguiapplication.cpp:1867
#18 0x00007f605a98fa85 in QApplication::exec () at kernel/qapplication.cpp:2824
#19 0x000056305b3b2509 in main (argc=<optimized out>, argv=0x7ffeb4d58b98) at
/usr/src/debug/kwin5-5.24.4-1.1.x86_64/src/main_x11.cpp:482
[Inferior 1 (process 2461) detached]

The reporter indicates this bug may be a duplicate of or related to bug 448064.

Possible duplicates by query: bug 453089, bug 452997, bug 452083, bug 451972,
bug 450954.

Reported using DrKonqi

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