Bug 441744

Summary: plasmashell dumps core when disconnecting a third (hdmi) display.
Product: [Plasma] plasmashell Reporter: kolja_20000
Component: generic-crashAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED DUPLICATE    
Severity: crash CC: nate
Priority: NOR    
Version: 5.22.4   
Target Milestone: 1.0   
Platform: Manjaro   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description kolja_20000 2021-08-30 08:28:05 UTC 
SUMMARY
System becomes unresponsive (hard restart required) after disconnecting the third display (via hdmi switch). Coredump created on this occasion.

STEPS TO REPRODUCE
1. Disconnect third display (via hdmi switch - probably irrelevant)
2. Remaining two displays (connected via DVI) should refresh and show the reconfigured desktop - but they remain black - and no keyboard response can bring the system back.

OBSERVED RESULT
System hang and coredump created.

EXPECTED RESULT
System remains functional on a two display setup.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Manjaro 21.1.0
(available in About System)
KDE Plasma Version: 5.22.4
KDE Frameworks Version: 5.85.0
Qt Version: 5.12.2

ADDITIONAL INFORMATION
Seems to have started happening after the latest rolling update was applied.

- How to provide the below file from /var/lib/systemd/coredump/ (file size limit of 4M)?
-rw-r-----+ 1 root root 100M 30. srp 08.13 core.plasmashell.1000.3cad9d81173a4a84a9372a991fc17b9d.1330.1630304010000000.zst
Comment 1 kolja_20000 2021-08-30 08:29:54 UTC 
Short of providing the coredump - this is what the journal contains:

systemd-coredump[108225]: [🡕] Process 1330 (plasmashell) of user 1000 dumped core.
                                                   
                                                   Stack trace of thread 1330:
                                                   #0  0x00007f1e49d92d22 raise (libc.so.6 + 0x3cd22)
                                                   #1  0x00007f1e4c270064 _ZN6KCrash19defaultCrashHandlerEi (libKF5Crash.so.5 + 0x5064)
                                                   #2  0x00007f1e49d92da0 __restore_rt (libc.so.6 + 0x3cda0)
                                                   #3  0x00007f1e3f488fbb n/a (libGLX_nvidia.so.0 + 0x4dfbb)
                                                   #4  0x00007f1e3f4c3fbe n/a (libGLX_nvidia.so.0 + 0x88fbe)
                                                   #5  0x00007f1e47a01e03 n/a (libGLX.so.0 + 0x13e03)
                                                   #6  0x00007f1e47a07715 n/a (libGLX.so.0 + 0x19715)
                                                   #7  0x00007f1e440721ab n/a (libqxcb-glx-integration.so + 0xb1ab)
                                                   #8  0x00007f1e4406f763 n/a (libqxcb-glx-integration.so + 0x8763)
                                                   #9  0x00007f1e4a823b62 _ZN14QOpenGLContext6createEv (libQt5Gui.so.5 + 0x181b62)
                                                   #10 0x00007f1e4be0d941 n/a (libQt5Quick.so.5 + 0x209941)
                                                   #11 0x00007f1e4a7e83f5 _ZN7QWindow5eventEP6QEvent (libQt5Gui.so.5 + 0x1463f5)
                                                   #12 0x00007f1e4b0e8ff6 _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5 + 0x15aff6)
                                                   #13 0x00007f1e4a3fd1aa _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 + 0x2c31aa)
                                                   #14 0x00007f1e4a7dd044 _ZN22QGuiApplicationPrivate18processExposeEventEPN29QWindowSystemInterfacePrivate11ExposeEventE (libQt5Gui.so.5 + 0x13b044)
                                                   #15 0x00007f1e4a7b0b15 _ZN22QWindowSystemInterface22sendWindowSystemEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt5Gui.so.5 + 0x10eb15)
                                                   #16 0x00007f1e44d06800 n/a (libQt5XcbQpa.so.5 + 0x63800)
                                                   #17 0x00007f1e486ee10c g_main_context_dispatch (libglib-2.0.so.0 + 0x5410c)
                                                   #18 0x00007f1e48741b99 n/a (libglib-2.0.so.0 + 0xa7b99)
                                                   #19 0x00007f1e486eb871 g_main_context_iteration (libglib-2.0.so.0 + 0x51871)
Comment 2 Nate Graham 2021-08-30 16:12:25 UTC 

*** This bug has been marked as a duplicate of bug 414805 ***