https://bugs.kde.org/show_bug.cgi?id=527536
Bug ID: 527536
Summary: KScreenlocker crashes, when malfunctioning display is
connected / gets disconnected
Classification: Plasma
Product: plasmashell
Version First 6.7.5
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: Screen locking
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
STEPS TO REPRODUCE
1. My monitor does not boot any longer, though I still can connect it via HDMI
and KDE automatically uses it as an external display (and disables the internal
laptop screen)
2. Disconnect the external screen as it does not work
I have obtained the backtrace after having build kscreenlocker with debug
symbols and w/o optimizations via kdesrc-build and running it in gdb.
1. kdesrc-build kscreenlocker for the 6.7 branch
2. gdb /path/to/kde/build/kscreenlocker/bin/kscreenlocker
3. run
4. Attach screen
5. Detach screen
OBSERVED RESULT
KScreenlocker crashes via a SEGV.
```
bt full
#0 0x00007ffff7e8d9d6 in
std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release (this=0x20016) at
/usr/include/c++/16/bits/shared_ptr_base.h:414
__wordbits = 32
__shiftbits = 32
__unique_ref = 4294967297
__both_counts = 0x2001e
__lock_free = true
__double_word = true
__aligned = true
#1 0x00007ffff7e8ffe9 in
std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count
(this=0x8d2fa8) at /usr/include/c++/16/bits/shared_ptr_base.h:1137
#2 0x00007ffff7e8f486 in std::__shared_ptr<QQmlEngine,
(__gnu_cxx::_Lock_policy)2>::~__shared_ptr (this=0x8d2fa0) at
/usr/include/c++/16/bits/shared_ptr_base.h:1611
#3 0x00007ffff7e8f4a2 in std::shared_ptr<QQmlEngine>::~shared_ptr
(this=0x8d2fa0) at /usr/include/c++/16/bits/shared_ptr.h:175
#4 0x00007ffff7f1484a in WallpaperItem::~WallpaperItem (this=0x8d2f20) at
/home/$user/kde/src/libplasma/src/plasmaquick/plasmoid/wallpaperitem.cpp:46
#5 0x00007fffcf214371 in ??? ()
#6 0x00007fffffffca30 in ??? ()
#7 0x00000000007a0dd0 in ??? ()
#8 0x00007fffffffca30 in ??? ()
#9 0x00007ffff397d6b2 in QObjectPrivate::deleteChildren (this=0x8d2f20) at
/usr/src/debug/qt6-qtbase-6.11.2-3.fc44.x86_64/src/corelib/kernel/qobject.cpp:2280
i = 1
```
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 44
KDE Plasma Version: 6.7.5
KDE Frameworks Version: 6.31.0
Qt Version: 6.11.2
Kernel Version: 7.2.11-200.fc44.x86_64 (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon Graphics
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