[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=416443

Nate Graham  changed:

   What|Removed |Added

  Component|generic-crash   |generic-performance

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=416443

Nate Graham  changed:

   What|Removed |Added

 CC||n...@kde.org

--- Comment #14 from Nate Graham  ---
The relevant-seeming thread:

Thread 1 (LWP 15045):
#0  0x7fc2b887d20d in QQuickParticleDataHeap::swap(int, int) () at
/usr/lib64/libQt5QuickParticles.so.5
#1  0x7fc2b887d5c0 in QQuickParticleDataHeap::bubbleUp(int) () at
/usr/lib64/libQt5QuickParticles.so.5
#2  0x7fc2b887def2 in
QQuickParticleDataHeap::insertTimed(QQuickParticleData*, int) () at
/usr/lib64/libQt5QuickParticles.so.5
#3  0x7fc2b887e629 in QQuickParticleGroupData::recycle() () at
/usr/lib64/libQt5QuickParticles.so.5
#4  0x7fc2b8880fc8 in  () at /usr/lib64/libQt5QuickParticles.so.5
#5  0x7fc2e504b5a1 in QAbstractAnimation::setCurrentTime(int) () at
/usr/lib64/libQt5Core.so.5
#6  0x7fc2e504b6d7 in  () at /usr/lib64/libQt5Core.so.5
#7  0x7fc2e5049c3b in QUnifiedTimer::updateAnimationTimers(long long) () at
/usr/lib64/libQt5Core.so.5
#8  0x7fc2e504a51c in QAnimationDriver::advanceAnimation(long long) () at
/usr/lib64/libQt5Core.so.5
#9  0x7fc2e6b72bb9 in  () at /usr/lib64/libQt5Quick.so.5
#10 0x7fc2e6b9769f in  () at /usr/lib64/libQt5Quick.so.5
#11 0x7fc2e5c9f5b1 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() at /usr/lib64/libQt5Widgets.so.5
#12 0x7fc2e5ca6b90 in QApplication::notify(QObject*, QEvent*) () at
/usr/lib64/libQt5Widgets.so.5
#13 0x7fc2e51ef3d2 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() at /usr/lib64/libQt5Core.so.5
#14 0x7fc2e523fc94 in QTimerInfoList::activateTimers() () at
/usr/lib64/libQt5Core.so.5
#15 0x7fc2e52404dc in  () at /usr/lib64/libQt5Core.so.5
#16 0x7fc2e2d2d5ae in g_main_context_dispatch () at
/usr/lib64/libglib-2.0.so.0
#17 0x7fc2e2d2d848 in  () at /usr/lib64/libglib-2.0.so.0
#18 0x7fc2e2d2d8dc in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#19 0x7fc2e5240913 in
QEventDispatcherGlib::processEvents(QFlags) ()
at /usr/lib64/libQt5Core.so.5
#20 0x7fc2e51ee2eb in
QEventLoop::exec(QFlags) () at
/usr/lib64/libQt5Core.so.5
#21 0x7fc2e51f6132 in QCoreApplication::exec() () at
/usr/lib64/libQt5Core.so.5
#22 0x560bda5a2223 in  ()
#23 0x7fc2e4bece4b in __libc_start_main () at /lib64/libc.so.6
#24 0x560bda5a264a in _start ()

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

--- Comment #13 from Mihai Sorin Dobrescu  ---
Hi, ignore the first debug output, I've reconfigured gdb.

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

--- Comment #12 from Mihai Sorin Dobrescu  ---
gdb --pid `pidof plasmashell` 
GNU gdb (Gentoo 8.3.1 vanilla) 8.3.1
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
.
Find the GDB manual and other documentation resources online at:
.

For help, type "help".
Type "apropos word" to search for commands related to "word".
Attaching to process 15045
[New LWP 15072]
[New LWP 15081]
[New LWP 15093]
[New LWP 15112]
[New LWP 15186]
[New LWP 15395]
[New LWP 15524]
[New LWP 15527]
[New LWP 15593]
[New LWP 17582]
[New LWP 18903]

warning: Unable to find libthread_db matching inferior's thread library, thread
debugging will not be available.

warning: Unable to find libthread_db matching inferior's thread library, thread
debugging will not be available.
0x7fc2b887d20d in QQuickParticleDataHeap::swap(int, int) () from
/usr/lib64/libQt5QuickParticles.so.5
(gdb) thread apply all bt

Thread 12 (LWP 18903):
#0  0x7fc2e432c13c in pthread_cond_wait () at /lib64/libpthread.so.0
#1  0x7fc2e5067c73 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib64/libQt5Core.so.5
#2  0x7fc2e5067cf9 in QWaitCondition::wait(QMutex*, unsigned long) () at
/usr/lib64/libQt5Core.so.5
#3  0x7fc2e6b9c949 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x7fc2e6b9cbaa in  () at /usr/lib64/libQt5Quick.so.5
#5  0x7fc2e50624b2 in  () at /usr/lib64/libQt5Core.so.5
#6  0x7fc2e4325458 in  () at /lib64/libpthread.so.0
#7  0x7fc2e4cd000f in clone () at /lib64/libc.so.6

Thread 11 (LWP 17582):
#0  0x7fc2e4cc3f73 in poll () at /lib64/libc.so.6
#1  0x7fc2e2d2d7b6 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x7fc2e2d2d8dc in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#3  0x7fc2e5240913 in
QEventDispatcherGlib::processEvents(QFlags) ()
at /usr/lib64/libQt5Core.so.5
#4  0x7fc2e51ee2eb in
QEventLoop::exec(QFlags) () at
/usr/lib64/libQt5Core.so.5
#5  0x7fc2e5061296 in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x7fc2e6b162e6 in  () at /usr/lib64/libQt5Quick.so.5
#7  0x7fc2e50624b2 in  () at /usr/lib64/libQt5Core.so.5
#8  0x7fc2e4325458 in  () at /lib64/libpthread.so.0
#9  0x7fc2e4cd000f in clone () at /lib64/libc.so.6

Thread 10 (LWP 15593):
#0  0x7fc2e432c13c in pthread_cond_wait () at /lib64/libpthread.so.0
#1  0x7fc2e5067c73 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib64/libQt5Core.so.5
#2  0x7fc2e5067cf9 in QWaitCondition::wait(QMutex*, unsigned long) () at
/usr/lib64/libQt5Core.so.5
#3  0x7fc2e6b9c949 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x7fc2e6b9cbaa in  () at /usr/lib64/libQt5Quick.so.5
#5  0x7fc2e50624b2 in  () at /usr/lib64/libQt5Core.so.5
#6  0x7fc2e4325458 in  () at /lib64/libpthread.so.0
#7  0x7fc2e4cd000f in clone () at /lib64/libc.so.6

Thread 9 (LWP 15527):
#0  0x7fc2e432c13c in pthread_cond_wait () at /lib64/libpthread.so.0
#1  0x7fc2e5067c73 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib64/libQt5Core.so.5
#2  0x7fc2e5067cf9 in QWaitCondition::wait(QMutex*, unsigned long) () at
/usr/lib64/libQt5Core.so.5
--Type  for more, q to quit, c to continue without paging--
#3  0x7fc2e6b9c949 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x7fc2e6b9cbaa in  () at /usr/lib64/libQt5Quick.so.5
#5  0x7fc2e50624b2 in  () at /usr/lib64/libQt5Core.so.5
#6  0x7fc2e4325458 in  () at /lib64/libpthread.so.0
#7  0x7fc2e4cd000f in clone () at /lib64/libc.so.6

Thread 8 (LWP 15524):
#0  0x7fc2e4cc3f73 in poll () at /lib64/libc.so.6
#1  0x7fc2e2d2d7b6 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x7fc2e2d2d8dc in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#3  0x7fc2e5240913 in
QEventDispatcherGlib::processEvents(QFlags) ()
at /usr/lib64/libQt5Core.so.5
#4  0x7fc2e51ee2eb in
QEventLoop::exec(QFlags) () at
/usr/lib64/libQt5Core.so.5
#5  0x7fc2e5061296 in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x7fc2b11be6c7 in KCupsConnection::run() () at
/usr/lib64/libkcupslib.so
#7  0x7fc2e50624b2 in  () at /usr/lib64/libQt5Core.so.5
#8  0x7fc2e4325458 in  () at /lib64/libpthread.so.0
#9  0x7fc2e4cd000f in clone () at /lib64/libc.so.6

Thread 7 (LWP 15395):
#0  0x7fc2e432c13c in pthread_cond_wait () at /lib64/libpthread.so.0
#1  0x7fc2e5067c73 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib64/libQt5Core.so.5
#2  0x7fc2e5067cf9 in QWaitCondition::wait(QMutex*, unsigned long) () at

[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

--- Comment #11 from Mihai Sorin Dobrescu  ---
I have no debug symbols, AFAIK, as it is a Sabayon regular release
installation.
It took less than 12 hours to freeze.

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

Mihai Sorin Dobrescu  changed:

   What|Removed |Added

 Ever confirmed|1   |0
 Status|NEEDSINFO   |REPORTED
 Resolution|BACKTRACE   |---

--- Comment #10 from Mihai Sorin Dobrescu  ---
sudo gdb --pid `pidof plasmashell` 
GNU gdb (Gentoo 8.3.1 vanilla) 8.3.1
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
.
Find the GDB manual and other documentation resources online at:
.

For help, type "help".
Type "apropos word" to search for commands related to "word".
Attaching to process 15045
[New LWP 15072]
[New LWP 15081]
[New LWP 15093]
[New LWP 15112]
[New LWP 15186]
[New LWP 15395]
[New LWP 15524]
[New LWP 15527]
[New LWP 15593]
[New LWP 17582]
[New LWP 18903]

warning: File "/lib64/libthread_db-1.0.so" 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 /lib64/libthread_db-1.0.so
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"

warning: Unable to find libthread_db matching inferior's thread library, thread
debugging will not be available.

warning: File "/lib64/libthread_db-1.0.so" auto-loading has been declined by
your `auto-load safe-path' set to "$debugdir:$datadir/auto-load".

warning: Unable to find libthread_db matching inferior's thread library, thread
debugging will not be available.
0x7fc2b887d109 in QQuickParticleDataHeap::swap(int, int) () from
/usr/lib64/libQt5QuickParticles.so.5
warning: File "/home/admius/.gdbinit" auto-loading has been declined by your
`auto-load safe-path' set to "$debugdir:$datadir/auto-load".
(gdb) thread apply all bt  

Thread 12 (LWP 18903):
#0  0x7fc2e432c13c in pthread_cond_wait () at /lib64/libpthread.so.0
#1  0x7fc2e5067c73 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib64/libQt5Core.so.5
#2  0x7fc2e5067cf9 in QWaitCondition::wait(QMutex*, unsigned long) () at
/usr/lib64/libQt5Core.so.5
#3  0x7fc2e6b9c949 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x7fc2e6b9cbaa in  () at /usr/lib64/libQt5Quick.so.5
#5  0x7fc2e50624b2 in  () at /usr/lib64/libQt5Core.so.5
#6  0x7fc2e4325458 in  () at /lib64/libpthread.so.0
#7  0x7fc2e4cd000f in clone () at /lib64/libc.so.6

Thread 11 (LWP 17582):
#0  0x7fc2e4cc3f73 in poll () at /lib64/libc.so.6
#1  0x7fc2e2d2d7b6 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x7fc2e2d2d8dc in g_main_context_iteration () at
/usr/lib64/libglib-2.0.so.0
#3  0x7fc2e5240913 in
QEventDispatcherGlib::processEvents(QFlags) ()
at /usr/lib64/libQt5Core.so.5
#4  0x7fc2e51ee2eb in
QEventLoop::exec(QFlags) () at
/usr/lib64/libQt5Core.so.5
#5  0x7fc2e5061296 in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x7fc2e6b162e6 in  () at /usr/lib64/libQt5Quick.so.5
#7  0x7fc2e50624b2 in  () at /usr/lib64/libQt5Core.so.5
#8  0x7fc2e4325458 in  () at /lib64/libpthread.so.0
#9  0x7fc2e4cd000f in clone () at /lib64/libc.so.6

Thread 10 (LWP 15593):
#0  0x7fc2e432c13c in pthread_cond_wait () at /lib64/libpthread.so.0
#1  0x7fc2e5067c73 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib64/libQt5Core.so.5
#2  0x7fc2e5067cf9 in QWaitCondition::wait(QMutex*, unsigned long) () at
/usr/lib64/libQt5Core.so.5
#3  0x7fc2e6b9c949 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x7fc2e6b9cbaa in  () at /usr/lib64/libQt5Quick.so.5
#5  0x7fc2e50624b2 in  () at /usr/lib64/libQt5Core.so.5
#6  0x7fc2e4325458 in  () at /lib64/libpthread.so.0
#7  0x7fc2e4cd000f in clone () at /lib64/libc.so.6

Thread 9 (LWP 15527):
#0  0x7fc2e432c13c in pthread_cond_wait () at /lib64/libpthread.so.0
#1  0x7fc2e5067c73 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at
/usr/lib64/libQt5Core.so.5
#2  0x7fc2e5067cf9 in QWaitCondition::wait(QMutex*, unsigned long) () at
/usr/lib64/libQt5Core.so.5
--Type  for more, q to quit, c to continue without paging--
#3  0x7fc2e6b9c949 in  () at /usr/lib64/libQt5Quick.so.5
#4  0x7fc2e6b9cbaa 

[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=416443

David Edmundson  changed:

   What|Removed |Added

 Resolution|--- |BACKTRACE
 Status|REOPENED|NEEDSINFO

--- Comment #9 from David Edmundson  ---
>What could I do to diagnose it, as I might have a short window of time to do 
>that?

sudo gdb --pid `pidof plasmashell` 

then when it connects

type "thread apply all bt"

and copy and paste all the output

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

--- Comment #8 from Mihai Sorin Dobrescu  ---
I've noticed another strange behaviour: in Dolphin, if I delete a file, the
confirmation dialog appears and that Dolphin instance freezes after the user
confirmation.

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

--- Comment #7 from Mihai Sorin Dobrescu  ---
Created attachment 125387
  --> https://bugs.kde.org/attachment.cgi?id=125387=edit
Plasma frozen

It displays 05:31:11, the time when it froze, despite now is passed 08:00.

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

Mihai Sorin Dobrescu  changed:

   What|Removed |Added

 Resolution|NOT A BUG   |---
 Ever confirmed|0   |1
 Status|RESOLVED|REOPENED

--- Comment #6 from Mihai Sorin Dobrescu  ---
Hello, seems that updated Plasma version or the shorter time have lead it in a
state when plasma is frozen, but tasks can still be changed and I have expanded
a Yakuake, so I can issue commands.
What could I do to diagnose it, as I might have a short window of time to do
that?

I can say that freeze occurs in less than 24 hours every time.

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

--- Comment #5 from Mihai Sorin Dobrescu  ---
Well, you could, but I presume you don't agree to try to reproduce it.

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=416443

David Edmundson  changed:

   What|Removed |Added

 Status|REPORTED|RESOLVED
 Resolution|--- |NOT A BUG

--- Comment #4 from David Edmundson  ---
Then I'm afraid i can't do anything.

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

Mihai Sorin Dobrescu  changed:

   What|Removed |Added

 Status|NEEDSINFO   |REPORTED
 Resolution|BACKTRACE   |---

--- Comment #3 from Mihai Sorin Dobrescu  ---
I have looked for some crash data, but I can't find any.

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[Mihai Sorin Dobrescu]

https://bugs.kde.org/show_bug.cgi?id=416443

--- Comment #2 from Mihai Sorin Dobrescu  ---
I don't know, the issue is that KDE simply freezes.
I can't get to tray or anything else.
I have even tried the power down button on my PC.
The system does not respond anymore (it should initiate a shutdown).
No console available or anything else, the keyboard does not trigger anything.
It's completely unresponsive. This is what I've meant by "freezing".

I have a laptop that has the same behaviour.

The author of the add-on did not respond.
The code is so small. Does it "tells" anything?

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[plasmashell] [Bug 416443] QT Particles seem to overload and block KDE Plasma

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=416443

David Edmundson  changed:

   What|Removed |Added

   Severity|major   |normal
 Resolution|--- |BACKTRACE
 Status|REPORTED|NEEDSINFO
 CC||k...@davidedmundson.co.uk

--- Comment #1 from David Edmundson  ---
Anything that happens only with a 3rd party addon is never major. Changing
status.

>Still, it seems to crash KSE Plasma somehow.

Crashes need a backtrace, or we can't do a lot. Please see the sad icon face in
the system tray after plasmashell restarts or run plasmashell specifically in
gdb. See
https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports

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