[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Bug Janitor Service]

https://bugs.kde.org/show_bug.cgi?id=383681

Bug Janitor Service  changed:

   What|Removed |Added

 Resolution|WAITINGFORINFO  |WORKSFORME
 Status|NEEDSINFO   |RESOLVED

--- Comment #23 from Bug Janitor Service  ---
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Bug Janitor Service]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #22 from Bug Janitor Service  ---
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Justin Zobel]

https://bugs.kde.org/show_bug.cgi?id=383681

Justin Zobel  changed:

   What|Removed |Added

 Resolution|--- |WAITINGFORINFO
 Status|REPORTED|NEEDSINFO

--- Comment #21 from Justin Zobel  ---
Thank you for the crash report.

As it has been a while since this was reported, can you please test and confirm
if this issue is still occurring or if this bug report can be marked as
resolved.

I have set the bug status to "needsinfo" pending your response, please change
back to "reported" or "resolved/worksforme" when you respond, thank you.

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Michael Palimaka]

https://bugs.kde.org/show_bug.cgi?id=383681

Michael Palimaka  changed:

   What|Removed |Added

 CC||kensing...@gentoo.org

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Martin Flöser]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #20 from Martin Flöser  ---
(In reply to Markus Heß from comment #19)
> Ok, I only noticed crashes of kscreenlocker. Everything else is working fine
> so far, so I assumed that this is related to this bug. Do you know if there
> is already an open issue or should I create a new one? Is this a kde or a
> nvidia issue?

The crash is in the nvidia driver and you updated nvidia -> nvidia.

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Markus Heß]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #19 from Markus Heß  ---
Ok, I only noticed crashes of kscreenlocker. Everything else is working fine so
far, so I assumed that this is related to this bug. Do you know if there is
already an open issue or should I create a new one? Is this a kde or a nvidia
issue?

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Martin Flöser]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #18 from Martin Flöser  ---
@Markus: your issue is different. Many applications started to crash with that
driver update with similar backtrace as yours. But it's clearly a different
issue! We can see this that your system crashed in Thread 5 and not in Thread
1.

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Markus Heß]

https://bugs.kde.org/show_bug.cgi?id=383681

Markus Heß  changed:

   What|Removed |Added

 CC||hess...@googlemail.com

--- Comment #17 from Markus Heß  ---
I am running KDE neon and got the same issue after upgrading to nvidia-384.
When I downgrade to nvidia-375 everything works fine. Unfortunately, I need
nvidia-384, because cuda depends on it.

Here is the backtrace from the core dump:

Thread 5 (Thread 0x7fffd4af4700 (LWP 5059)):
#0  0x7fffdee12892 in ?? () from
/usr/lib/nvidia-384/libnvidia-glcore.so.384.66
#1  0x7fffdf0d483a in ?? () from
/usr/lib/nvidia-384/libnvidia-glcore.so.384.66
#2  0x7fffdefa0fda in ?? () from
/usr/lib/nvidia-384/libnvidia-glcore.so.384.66
#3  0x7fffdefb6ed4 in ?? () from
/usr/lib/nvidia-384/libnvidia-glcore.so.384.66
#4  0x7fffdefa57ce in ?? () from
/usr/lib/nvidia-384/libnvidia-glcore.so.384.66
#5  0x75f0b681 in
QSGBatchRenderer::Renderer::renderMergedBatch(QSGBatchRenderer::Batch const*)
() from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x75f0bf8d in QSGBatchRenderer::Renderer::renderBatches() () from
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x75f11909 in QSGBatchRenderer::Renderer::render() () from
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x75f0209f in QSGRenderer::renderScene(QSGBindable const&) () from
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x75f0257b in QSGRenderer::renderScene(unsigned int) () from
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x75f3dd2e in
QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () from
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x75f97b04 in QQuickWindowPrivate::renderSceneGraph(QSize const&)
() from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x75f4715e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x75f4b8dc in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x74e28989 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x739966ba in start_thread (arg=0x7fffd4af4700) at
pthread_create.c:333
#16 0x747353dd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fffe4f2b700 (LWP 5058)):
---Type  to continue, or q  to quit---
#0  0x7472970d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x7122b38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x7122b49c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x7505192f in
QEventDispatcherGlib::processEvents(QFlags) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x74ffa7ca in
QEventLoop::exec(QFlags) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x74e23cd4 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x75c7d0c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x74e28989 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x739966ba in start_thread (arg=0x7fffe4f2b700) at
pthread_create.c:333
#9  0x747353dd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fffe572c700 (LWP 5052)):
#0  0x7472970d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x7122b38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x7122b49c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x7505192f in
QEventDispatcherGlib::processEvents(QFlags) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x74ffa7ca in
QEventLoop::exec(QFlags) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x74e23cd4 in QThread::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x77f42b75 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x74e28989 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x739966ba in start_thread (arg=0x7fffe572c700) at
pthread_create.c:333
---Type  to continue, or q  to quit---
#9  0x747353dd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fffe7901700 (LWP 5050)):
#0  0x7472970d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x741c9c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x741cb8d7 in xcb_wait_for_event () from
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x7fffeaccb329 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x74e28989 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x739966ba in start_thread (arg=0x7fffe7901700) at
pthread_create.c:333
#6  0x747353dd in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fffeb2268c0 (LWP 5045)):
#0  

[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Jerrod Frost]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #16 from Jerrod Frost  ---
I'm not the one with the intel card, thats another member. I only have AMD
cards and one old nvidia (nouveau) card.

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Arthur Țițeică]

https://bugs.kde.org/show_bug.cgi?id=383681

Arthur Țițeică  changed:

   What|Removed |Added

 CC||arthur+...@cloud.titeica.ro

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Fabian Vogt]

https://bugs.kde.org/show_bug.cgi?id=383681

Fabian Vogt  changed:

   What|Removed |Added

 CC||fab...@ritter-vogt.de

--- Comment #15 from Fabian Vogt  ---
I can confirm that this does not appear to affect TW, at least I haven't heard
of any cases nor experienced it myself.
We're currently on Qt 5.9.1, Plasma 5.10.4, X.org 1.19.3 and Mesa 17.1.6.

(In reply to Jerrod Frost from comment #13)
> I can't seem to find a way to see what flags were used to compile Suse
> Tumbleweed's packages..

For some reason the full package build logs on OBS are only available to
logged-in users, so I'll dump some flags here.

Qt Core: ./configure -prefix /usr -L /usr/lib64 -libdir /usr/lib64 -archdatadir
/usr/lib64/qt5 -bindir /usr/lib64/qt5/bin -datadir /usr/share/qt5 -docdir
/usr/share/doc/packages/qt5 -examplesdir /usr/lib64/qt5/examples -headerdir
/usr/include/qt5 -importdir /usr/lib64/qt5/imports -libexecdir
/usr/lib64/qt5/libexec -plugindir /usr/lib64/qt5/plugins -sysconfdir /etc/xdg
-translationdir /usr/share/qt5/translations -verbose -reduce-relocations
-optimized-qmake -accessibility -no-strip -opensource -no-separate-debug-info
-shared -xkb -system-xkbcommon -dbus-linked -sm -no-rpath -system-libjpeg
-openssl-linked -system-libpng -system-harfbuzz -fontconfig -system-freetype
-cups -system-zlib -no-pch -glib -system-sqlite -no-sql-mysql -no-strip
-libproxy -xcb -egl -eglfs -opengl desktop -release -plugin-sql-sqlite -nomake
tests -plugin-sql-psql -I/usr/include/pgsql/ -I/usr/include/pgsql/server
-plugin-sql-odbc -plugin-sql-mysql -I/usr/include/mysql/ -v

Mesa: ./configure --host=x86_64-suse-linux-gnu --build=x86_64-suse-linux-gnu
--program-prefix= --disable-dependency-tracking --prefix=/usr
--exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
--datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
--libexecdir=/usr/lib --localstatedir=/var --sharedstatedir=/var/lib
--mandir=/usr/share/man --infodir=/usr/share/info --disable-dependency-tracking
--enable-libglvnd --enable-gles1 --enable-gles2 --enable-dri
--with-platforms=x11,drm,wayland --enable-shared-glapi --enable-texture-float
--enable-osmesa --enable-dri3 --enable-nine --enable-gbm --enable-glx-tls
--enable-opencl --enable-opencl-icd --with-dri-searchpath=/usr/lib64/dri
--enable-llvm --enable-llvm-shared-libs --enable-vdpau --enable-va
--enable-xvmc --with-vulkan-drivers=intel,radeon --enable-xa
--with-dri-drivers=i915,i965,nouveau,r200,radeon
--with-gallium-drivers=r300,r600,radeonsi,nouveau,swrast,svga,virgl
'CFLAGS=-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2
-fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -g
-DNDEBUG'

kscreenlocker: cmake -DCMAKE_BUILD_TYPE=None -DKDE_INSTALL_USE_QT_SYS_PATHS=OFF
'-DCMAKE_C_FLAGS=-fmessage-length=0 -grecord-gcc-switches -O2 -Wall
-D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables
-fasynchronous-unwind-tables -g -DNDEBUG' '-DCMAKE_CXX_FLAGS=-fmessage-length=0
-grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector
-funwind-tables -fasynchronous-unwind-tables -g -DNDEBUG'
'-DCMAKE_EXE_LINKER_FLAGS=-Wl,--as-needed -Wl,--no-undefined
-Wl,-Bsymbolic-functions' '-DCMAKE_MODULE_LINKER_FLAGS=-Wl,--as-needed
-Wl,--no-undefined -Wl,-Bsymbolic-functions'
'-DCMAKE_SHARED_LINKER_FLAGS=-Wl,--as-needed -Wl,--no-undefined
-Wl,-Bsymbolic-functions' -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_PREFIX_PATH=/usr
-DKDE_INSTALL_LIBDIR=lib64 -DKDE_INSTALL_SYSCONFDIR=/etc
-DKDE_INSTALL_QTPLUGINDIR=lib64/qt5/plugins
-DKDE_INSTALL_PLUGINDIR=lib64/qt5/plugins -DKDE_INSTALL_QMLDIR=lib64/qt5/qml
-DKDE_INSTALL_QTQUICKIMPORTSDIR=lib64/qt5/imports
-DECM_MKSPECS_INSTALL_DIR=/usr/lib64/qt5/mkspecs/modules
-DKDE_INSTALL_METAINFODIR=/usr/share/metainfo -DBUILD_TESTING=OFF ..
-DKDE4_COMMON_PAM_SERVICE=xdm -DCMAKE_INSTALL_LOCALEDIR=/usr/share/locale/kf5

LLVM is built with LTO, but that shouldn't matter.
The common CFLAGS are "-fmessage-length=0 -grecord-gcc-switches -O2 -Wall
-D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables
-fasynchronous-unwind-tables -g -DNDEBUG"

The biggest difference is proabably the version of GCC.
In TW we're currently using 7.1.1, while you're still on GCC 4.9.3.

There are quite a few users of Plasma 5.10.4 on Leap 42.3 however, which has
older GCC (4.8), Mesa and X
and doesn't seem to be affected either, or at least not that badly.

Can you provide a backtrace of the crash on intel (with modesetting)?

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Martin Flöser]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #14 from Martin Flöser  ---
(In reply to Jerrod Frost from comment #12)
> appears related to this?
> 
> https://lists.fedoraproject.org/archives/list/k...@lists.fedoraproject.org/
> thread/P3GKSSLCV2YZT4UTFDHCP6S4CQ453J35/

No, that's about the xorg Intel driver. Nobody uses this nowadays, everyone is
on modesettings.

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Jerrod Frost]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #13 from Jerrod Frost  ---
I can't seem to find a way to see what flags were used to compile Suse
Tumbleweed's packages..

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Jerrod Frost]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #12 from Jerrod Frost  ---
appears related to this?

https://lists.fedoraproject.org/archives/list/k...@lists.fedoraproject.org/thread/P3GKSSLCV2YZT4UTFDHCP6S4CQ453J35/

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Martin Flöser]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #11 from Martin Flöser  ---
This seems to work on openSUSE Tumbleweed - we did not get any complaints so
far. Could you please compare whether there are differences in how packages
like e.g. Mesa are compiled?

There must be an important difference. We need to figure out what it is.

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Jerrod Frost]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #10 from Jerrod Frost  ---
Yes, both default and custom have the issue. I've even wiped out all KDE
settings and started over only to see the same issue.

On Sun, Aug 20, 2017, 12:07 PM Martin Flöser 
wrote:

> https://bugs.kde.org/show_bug.cgi?id=383681
>
> --- Comment #9 from Martin Flöser  ---
> Better disable seccomp than dri3.
>
> Nevertheless I would like to figure out what is different in the case of
> Sabayon. We shipped 5.10 in June and this is the first report of it not
> working. Other distributions also use seccomp and DRI3.
>
> So again: do you use the default theme?
>
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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Martin Flöser]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #9 from Martin Flöser  ---
Better disable seccomp than dri3.

Nevertheless I would like to figure out what is different in the case of
Sabayon. We shipped 5.10 in June and this is the first report of it not
working. Other distributions also use seccomp and DRI3.

So again: do you use the default theme?

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Jerrod Frost]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #8 from Jerrod Frost  ---
There are 2 ways to work around this problem:
1. use -seccomp USE flag at compile time
2. disable DRI3 

1. removes seccomp flag, but keeps DRI3 and Vulkan and fixes both Intel and AMD
2. removes vulkan and DRI3 but keeps seccomp flag and fixes both Intel and AMD

Issue affects both Mesa 17.1.5 and Mesa 17.2.0-rc4

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Jerrod Frost]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #7 from Jerrod Frost  ---
Created attachment 107407
  --> https://bugs.kde.org/attachment.cgi?id=107407=edit
machine overview

View of GCC, mesa, kernel, kscreenlocker  USE flags and compile output.

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Martin Flöser]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #6 from Martin Flöser  ---
OK, so we need to figure out what is different in your distribution to all
other distributions. Obvious things first: this works on other distributions.

KScreenlocker saw some changes in Plasma 5.10, but no other distro reported
issues with it. I sent detailed instructions to the kde distributions mailing
list about the changes involved.

Please verify that all (optional) build dependencies are installed. Please
attach an output of the cmake run. Most importantly to verify: is the seccomp
dependency found and does this work on your distribution?

Are you using the default lock screen theme or a custom one? If a custom one:
does the problem also happen with the default theme? If not please attach the
custom theme.

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Jerrod Frost]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #5 from Jerrod Frost  ---
All we did is upgraded plasma 5.9.5 to 5.10.4 

Intel is also affected. I'm part of the Sabayon Linux software testing team.
We've located the issue. It's 100% with DRI3. Once we downgrade to DRI2.
Everything works in both Intel and AMD graphics cards. DRI3 isn't compatible.
This is bad as it disables vulkan for open source drivers. KDE+gaming is a no
go at this point.

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Martin Flöser]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #4 from Martin Flöser  ---
>From the backtrace it looks like a crash in radeon driver called from Qt. Could
it be that you also updated either Qt or driver or kernel?

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Jerrod Frost]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #3 from Jerrod Frost  ---
jcfrosty@CtrlZ ~ $ sudo coredumpctl gdb /usr/lib64/libexec/kscreenlocker_greet 
   PID: 4124 (kscreenlocker_g)
   UID: 1002 (jcfrosty)
   GID: 1003 (jcfrosty)
Signal: 11 (SEGV)
 Timestamp: Fri 2017-08-18 22:53:22 CDT (13h ago)
  Command Line: /usr/lib64/libexec/kscreenlocker_greet --testing
Executable: /usr/lib64/libexec/kscreenlocker_greet
 Control Group: /user.slice/user-1002.slice/session-1.scope
  Unit: session-1.scope
 Slice: user-1002.slice
   Session: 1
 Owner UID: 1002 (jcfrosty)
   Boot ID: 09af5c1a0b714138a3c9edf3caff684f
Machine ID: f812d2ab6856476f95d56e868635927b
  Hostname: CtrlZ
   Storage:
/var/lib/systemd/coredump/core.kscreenlocker_g.1002.09af5c1a0b714138a3c9edf3caff684f.4124.150311480200.lz4
   Message: Process 4124 (kscreenlocker_g) of user 1002 dumped core.

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Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/lib64/libexec/kscreenlocker_greet...Reading symbols
from /usr/lib64/debug//usr/lib64/libexec/kscreenlocker_greet.debug...(no
debugging symbols found)...done.
(no debugging symbols found)...done.

warning: core file may not match specified executable file.
[New LWP 4124]
[New LWP 4127]
[New LWP 4128]
[New LWP 4131]
[New LWP 4132]
[New LWP 4135]
[New LWP 4125]
[New LWP 4129]
[New LWP 4130]
[New LWP 4134]
[New LWP 4133]
Core was generated by `/usr/lib64/libexec/kscreenlocker_greet --testing'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x7f6fee2f732b in ?? ()
[Current thread is 1 (LWP 4124)]
warning: File "/home/jcfrosty/.gdbinit" auto-loading has been declined by your
`auto-load safe-path' set to "$debugdir:$datadir/auto-load".
To enable execution of this file add
add-auto-load-safe-path /home/jcfrosty/.gdbinit
line to your configuration file "/root/.gdbinit".
To completely disable this security protection add
set auto-load safe-path /
line to your configuration file "/root/.gdbinit".
For more information about this security protection see the
"Auto-loading safe path" section in the GDB manual.  E.g., run from the shell:
info "(gdb)Auto-loading safe path"
(gdb) run --testing
Starting program: /usr/lib64/libexec/kscreenlocker_greet --testing
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7fffe5b12700 (LWP 25109)]
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
[New Thread 0x7fffd5343700 (LWP 25111)]
[New Thread 0x7fffd4a01700 (LWP 25112)]
[New Thread 0x7fffd3ffb700 (LWP 25113)]
[New Thread 0x7fffd37fa700 (LWP 25114)]
[New Thread 0x7fffd2ff9700 (LWP 25115)]
[New Thread 0x7fffd27f8700 (LWP 25116)]
[New Thread 0x7fffd1ff7700 (LWP 25117)]
[New Thread 0x7fffd17f6700 (LWP 25118)]
[Thread 0x7fffd17f6700 (LWP 25118) exited]
[New Thread 0x7fffd17f6700 (LWP 25119)]
[New Thread 0x7fffd0ff5700 (LWP 25125)]
QObject: Cannot create children for a parent that is in a different thread.
(Parent is ScreenLocker::UnlockApp(0x7fffe170), parent's thread is
QThread(0x622450), current thread is QThread(0x699cf0)
QObject::installEventFilter(): Cannot filter events for objects in a different
thread.
QObject: Cannot create children for a parent that is in a different thread.
(Parent is ScreenLocker::UnlockApp(0x7fffe170), parent's thread is
QThread(0x622450), current thread is QThread(0x699cf0)
org.kde.kcoreaddons: Failed to establish shared memory mapping, will fallback
to private memory -- memory usage will increase
QObject: Cannot create children for a parent that is in a different thread.
(Parent is ScreenLocker::UnlockApp(0x7fffe170), parent's thread is
QThread(0x622450), current thread is QThread(0x699cf0)
QObject::installEventFilter(): Cannot filter events for objects in a different
thread.
No metadata file in the package, expected it at: "/usr/share/backgrounds/"
No metadata file in the package, expected it at: "/usr/share/backgrounds/"
No metadata file in the package, expected it at: "/usr/share/backgrounds/"
[New Thread 0x7fffc235e700 (LWP 25126)]
No metadata file in the package, expected it at: "/usr/share/backgrounds/"
No metadata file in the package, expected it at: 

[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Jerrod Frost]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #2 from Jerrod Frost  ---
Yeah, I'm fighting to use gdb right now. Wish I understood what I was doing
more... I'll get it to you as soon as I can. I can definitely say this issue
didn't exist in plasma 5.9.5 .

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[kscreenlocker] [Bug 383681] Kscreenlocker 5.10.4 only crashes

[Martin Flöser]

https://bugs.kde.org/show_bug.cgi?id=383681

--- Comment #1 from Martin Flöser  ---
Could you please run kscreenlocker_greet through Feb and attach the backtrace?

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