After having kwin crashed i tried to restart it and run 'kwin --replace' but it continued crashing, the output:

~$ kwin --replace
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 9: reading configurations from ~/.fonts.conf is deprecated.
QCoreApplication::sendPostedEvents: Cannot send posted events for objects in another thread
QCoreApplication::sendPostedEvents: Cannot send posted events for objects in another thread
QCoreApplication::sendPostedEvents: Cannot send posted events for objects in another thread
QCoreApplication::sendPostedEvents: Cannot send posted events for objects in another thread
OpenGL vendor string:                   Intel Open Source Technology Center
OpenGL renderer string:                 Mesa DRI Intel(R) Sandybridge Mobile 
OpenGL version string:                  3.0 Mesa 9.0.1
OpenGL shading language version string: 1.30
Driver:                                 Intel
GPU class:                              SandyBridge
OpenGL version:                         3.0
GLSL version:                           1.30
Mesa version:                           9.0.1
X server version:                       1.13
Linux kernel version:                   3.5
Direct rendering:                       yes
Requires strict binding:                no
GLSL shaders:                           yes
Texture NPOT support:                   yes
Virtual Machine:                        no

The original crash is in the aurorae decoration, possibly Qt.

As for the follow-up crashes, we'll rather need a backtrace than the konsole output.

To restore the syste, try to alter the decoration (~/.kde/share/config/kwinrc, delete the "PluginLib" key in the [Style] section.

Did you recently perform an "apt-get upgrade" or similar?

Created attachment 75581 [details]
possible patch

attached is a possible (completely untested) patch, but this is of course silly (as  post deleting the view has been ...)

*** Bug 311110 has been marked as a duplicate of this bug. ***

Git commit dcb8165e46028431ff3c2ae4908ccd441eca818a by Thomas Lübking.
Committed on 11/12/2012 at 16:09.
Pushed by luebking into branch 'master'.

defer all member destruction to next event cycle
FIXE-IN: 4.10

M  +4    -0    kwin/clients/aurorae/src/aurorae.cpp

http://commits.kde.org/kde-workspace/dcb8165e46028431ff3c2ae4908ccd441eca818a

*** Bug 312399 has been marked as a duplicate of this bug. ***

There goes our patch.

Crashy Qt line seems:
if (!d->parent || (parentItem() && !parentItem()->QGraphicsItem::d_ptr->inDestructor)) {

so probably parentItem() is dangeling.

Once more: does anybody encountering this or bug #304617 NOT use ubuntu?

*** Bug 313132 has been marked as a duplicate of this bug. ***

Created attachment 76536 [details]
New crash information added by DrKonqi

kwin (4.9.97) on KDE Platform 4.9.97 using Qt 4.8.4

- What I was doing when the application crashed:

changed to air oxygen color theme... then crash happened

nice day

Simon :)

-- Backtrace (Reduced):
#7  0xb6aefd9e in QDeclarativeItem::~QDeclarativeItem (this=0x9b728d8, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#8  0xb6aaec74 in ~QDeclarativeElement (this=0x9b728d8, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x9b728d8, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#10 0xb5fc47f3 in qDeleteInEventHandler (o=o@entry=0x9b728d8) at kernel/qobject.cpp:4269
#11 0xb5fc6f80 in QObject::event (this=0x9b728d8, e=0x9e652b8) at kernel/qobject.cpp:1175

Created attachment 76796 [details]
New crash information added by DrKonqi

kwin (4.9.98) on KDE Platform 4.9.98 using Qt 4.8.4

- What I was doing when the application crashed:

I attempted to swap the window direction of my KDE setup on Kubuntu 13.04. 

- Unusual behavior I noticed:

After swapping the decoration, the entire decoration disappeared. I had to run "kwin --replace" to get it to apply. This is a persistant problem.

-- Backtrace (Reduced):
#6  0x00007f76f21ca4b7 in QDeclarativeItem::~QDeclarativeItem (this=0x1bc2b00, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#7  0x00007f76f218e0de in ~QDeclarativeElement (this=0x1bc2b00, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#8  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x1bc2b00, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  0x00007f76ee66e5b8 in QObject::event (this=0x1bc2b00, e=<optimized out>) at kernel/qobject.cpp:1175
#10 0x00007f76ed9fffbc in QApplicationPrivate::notify_helper (this=this@entry=0x128c9d0, receiver=receiver@entry=0x1bc2b00, e=e@entry=0x1e078b0) at kernel/qapplication.cpp:4567

Setting to UPSTREAM: when looking at Plasma crashes I have seen similar crashes in the dtor of QDeclarativeItem quite often and they are also on UPSTREAM.

*** Bug 314445 has been marked as a duplicate of this bug. ***

*** Bug 314508 has been marked as a duplicate of this bug. ***

*** Bug 314606 has been marked as a duplicate of this bug. ***

*** Bug 314716 has been marked as a duplicate of this bug. ***

*** Bug 314737 has been marked as a duplicate of this bug. ***

Created attachment 77049 [details]
New crash information added by DrKonqi

kwin (4.10.00) on KDE Platform 4.10.00 using Qt 4.8.2

- What I was doing when the application crashed:

Changed Decoration.. It happens everytime so far, whenever I try that.

-- Backtrace (Reduced):
#6  0x00007fc3e97399ee in QDeclarativeItem::~QDeclarativeItem (this=0x1e99f90, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#7  0x00007fc3e96fcaf5 in ~QDeclarativeElement (this=0x1e99f90, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#8  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x1e99f90, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  0x00007fc3e5b18958 in QObject::event (this=0x1e99f90, e=<optimized out>) at kernel/qobject.cpp:1176
#10 0x00007fc3e4e807b4 in notify_helper (e=0x26a1670, receiver=0x1e99f90, this=0x19e7ad0) at kernel/qapplication.cpp:4556

*** Bug 314758 has been marked as a duplicate of this bug. ***

*** Bug 314891 has been marked as a duplicate of this bug. ***

*** Bug 315087 has been marked as a duplicate of this bug. ***

Created attachment 77311 [details]
New crash information added by DrKonqi

kwin (4.10.00) on KDE Platform 4.10.00 using Qt 4.8.2

- What I was doing when the application crashed:
Changing window decorations.  I couldn't really tell which ones, if any specifically caused the crash as it happened most of the time I changed.

-- Backtrace (Reduced):
#6  0x00007ff4775039ee in QDeclarativeItem::~QDeclarativeItem (this=0xd3d7e0, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#7  0x00007ff4774c6af5 in ~QDeclarativeElement (this=0xd3d7e0, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#8  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0xd3d7e0, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  0x00007ff4738e2958 in QObject::event (this=0xd3d7e0, e=<optimized out>) at kernel/qobject.cpp:1176
#10 0x00007ff472c4a7b4 in notify_helper (e=0xbeccd0, receiver=0xd3d7e0, this=0x9954f0) at kernel/qapplication.cpp:4556

*** Bug 304617 has been marked as a duplicate of this bug. ***

Created attachment 77402 [details]
New crash information added by DrKonqi

kwin (4.10.00) on KDE Platform 4.10.00 using Qt 4.8.3

- What I was doing when the application crashed:
changing window decaration,
does this every time

-- Backtrace (Reduced):
#7  0x00007f5b5d602dd7 in QDeclarativeItem::~QDeclarativeItem (this=0x1899f60, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#8  0x00007f5b5d5c66ee in ~QDeclarativeElement (this=0x1899f60, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x1899f60, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#10 0x00007f5b59aac468 in QObject::event (this=0x1899f60, e=<optimized out>) at kernel/qobject.cpp:1176
#11 0x00007f5b58e3ee9c in QApplicationPrivate::notify_helper (this=this@entry=0x15b4d90, receiver=receiver@entry=0x1899f60, e=e@entry=0x24dd030) at kernel/qapplication.cpp:4562

Created attachment 77510 [details]
New crash information added by DrKonqi

kwin (4.10.00) on KDE Platform 4.10.00 using Qt 4.8.3

- Change Plasma theme

- change from one to other

- nothing change

-- Backtrace (Reduced):
#6  0x00007f57309d9dd4 in QDeclarativeItem::~QDeclarativeItem (this=0x2054170, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#7  0x00007f573099d6ee in ~QDeclarativeElement (this=0x2054170, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#8  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x2054170, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  0x00007f572cedf498 in QObject::event (this=0x2054170, e=<optimized out>) at kernel/qobject.cpp:1176
#10 0x00007f572c271e9c in QApplicationPrivate::notify_helper (this=this@entry=0x1c84ea0, receiver=receiver@entry=0x2054170, e=e@entry=0x21758d0) at kernel/qapplication.cpp:4562

*** Bug 315671 has been marked as a duplicate of this bug. ***

*** Bug 315984 has been marked as a duplicate of this bug. ***

*** Bug 316001 has been marked as a duplicate of this bug. ***

I can also confirm this bug when changing decorations in 4.10.

All of kwin doesn't crash, but the top title bar/window decoration goes away.

kwin --replace solves the issue.

That is not nearly the same bug.
Please file a new one any attach the output of "qdbus org.kde.kwin /KWin supportInformation" there as well as "from what decoration to what decoration" you switched and (because of the other report ;-) whether it only occurs for freshly installed decos from GHNS.

*** Bug 316076 has been marked as a duplicate of this bug. ***

*** Bug 316152 has been marked as a duplicate of this bug. ***

last dupe claims relation to raster graphicssystem and/or opengl compositor

Can someone explain to me what is going on with this bug? It says its closed and yet I believe we are all still experiencing the issue. Is there a workaround or patch?

"resolved upstream" - it's a bug in Qt.
Bug #300393 claims it to be fixed with Qt 4.8.4

As far as a workaround, gotta report this:

I switched form nouveau to one of the proprietary nvidia drivers.  The  
behavior went away.  My card is a geforce 7600.


On Tue, 05 Mar 2013 12:40:19 +0200, Dustin Falgout <falgout@outlook.com>  
wrote:

> https://bugs.kde.org/show_bug.cgi?id=311018
>
> --- Comment #34 from Dustin Falgout <falgout@outlook.com> ---
> Can someone explain to me what is going on with this bug? It says its  
> closed
> and yet I believe we are all still experiencing the issue. Is there a
> workaround or patch?
>

Created attachment 77805 [details]
New crash information added by DrKonqi

systemsettings (1.0) on KDE Platform 4.10.00 using Qt 4.8.4

- What I was doing when the application crashed:
Navigating through the SystemSettings application
- Unusual behavior I noticed:
Xorg eats 100% of CPU at that moment even if  I switch desktop effects off

-- Backtrace (Reduced):
#7  0x00007fb0fc84b947 in QDeclarativeItem::~QDeclarativeItem (this=0x512f350, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#8  0x00007fb0fc81010e in ~QDeclarativeElement (this=0x512f350, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x512f350, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#10 0x00007fb0ffc925d8 in QObject::event (this=0x512f350, e=<optimized out>) at kernel/qobject.cpp:1175
#11 0x00007fb1008db8ec in QApplicationPrivate::notify_helper (this=this@entry=0x925630, receiver=receiver@entry=0x512f350, e=e@entry=0x20935c0) at kernel/qapplication.cpp:4567

Created attachment 77849 [details]
New crash information added by DrKonqi

kwin (4.10.1) on KDE Platform 4.10.1 using Qt 4.8.4

- What I was doing when the application crashed:

I was changing window decoration behavior for mouse event, i.e. to shade windows for a wheel scroll, to lower for middle button

- Unusual behavior I noticed:

Window decodations dissapeared fora moment, then reappeared with a crash handler	

- Custom settings of the application:

Custom mouse events settings

-- Backtrace (Reduced):
#6  0x00007f24b53de944 in QDeclarativeItem::~QDeclarativeItem (this=0x170ec20, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#7  0x00007f24b53a310e in ~QDeclarativeElement (this=0x170ec20, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#8  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x170ec20, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  0x00007f24b18875d8 in QObject::event (this=0x170ec20, e=<optimized out>) at kernel/qobject.cpp:1175
#10 0x00007f24b0c138ec in QApplicationPrivate::notify_helper (this=this@entry=0x14ed5a0, receiver=receiver@entry=0x170ec20, e=e@entry=0x2155610) at kernel/qapplication.cpp:4567

Can anybody reproducing this crash try https://git.reviewboard.kde.org/r/109273/
It's supposed to fix/workaround/bypass sth. different but *might* implicitly bypass this issue as well.

Just how would I go about testing this for you? I have tried searching for the aurorae.cpp file to edit but cant find it so I am probably way off base. If you could point me in the right direction, I will test it tonight. Thanks!

(In reply to comment #39)
> Can anybody reproducing this crash try
> https://git.reviewboard.kde.org/r/109273/
> It's supposed to fix/workaround/bypass sth. different but *might* implicitly
> bypass this issue as well.

you should be able to download the patch and from the kwin dir
patch -p2 < path/to/patch.diff

the sources are in kde-workspace/kwin/clients/aurorae/src/aurorae.cpp
it's sufficient to recompile/install only the aurorae client.

I do not have that directory. The only aurorae directory I have is at /usr/share/kde4/apps/kwin/aurorae but it only contains some .qml files. I even tried several different searches for aurorae.cpp as well as trying to find other directories in the path you gave and came up with nothing. Either I am crazy, or its not on my system lol

(In reply to comment #41)
> you should be able to download the patch and from the kwin dir
> patch -p2 < path/to/patch.diff
> 
> the sources are in kde-workspace/kwin/clients/aurorae/src/aurorae.cpp
> it's sufficient to recompile/install only the aurorae client.

you have to compile kwin yourself for this, it's not like patching some runtime resource - this is the sourcecode for gcc

Oh ok that would explain it then. Sorry, I have only been using linux as my daily driver for about 2 months, so there is a lot left for me to learn. I am willing to try it out if you still need it tested and if you dont mind giving me some instructions.


(In reply to comment #43)
> you have to compile kwin yourself for this, it's not like patching some
> runtime resource - this is the sourcecode for gcc

this *could* bypass this crash (not "fix" it, though)
It would be great if anyone encountering it could provide feedback on the 4.10.2 situation, thanks.

-----------

Git commit 45a6f0a2ecc79fe974f69cde6c4941dfb6ec5ab8 by Thomas Lübking.
Committed on 03/03/2013 at 21:46.
Pushed by luebking into branch 'KDE/4.10'.

fix aurorae theme loading

I've no real idea what breaks the theme -> qml assignment but the patch
re/creates the theme object (just as the engine and component) with the theme
FIXED-IN: 4.10.2
REVIEW: 109273

M  +2    -5    kwin/clients/aurorae/src/aurorae.cpp

http://commits.kde.org/kde-workspace/45a6f0a2ecc79fe974f69cde6c4941dfb6ec5ab8

*** Bug 317409 has been marked as a duplicate of this bug. ***

*** Bug 318997 has been marked as a duplicate of this bug. ***

Latest duplicate is from Qt 4.8.4 / KDE 4.10.2, so the workaround is not effective.

I love QDeclarative crashes, they are so easy to debug...

*** Bug 320120 has been marked as a duplicate of this bug. ***

*** Bug 320250 has been marked as a duplicate of this bug. ***