Version:            (using KDE 4.2.1)
Compiler:          gcc version 4.3.3 (GCC) i686
OS:                Linux
Installed from:    Unlisted Binary Package

Hi,

my monitor (LG Flatron 995FT - 19" - 1200x1024) has broken down and I have had no other choice but switch it for another one (Compaq MV500 - 15" - 1024x768) I had at home. Since then, plasma is unable to start up successfully and it always crashes.

* Here you have a trace if I launch it from a console:
---------------------------
[musikolo@Kalisto ~]$ plasma
Xlib:  extension "Generic Event Extension" missing on display ":0.0".
Xlib:  extension "Generic Event Extension" missing on display ":0.0".
Xlib:  extension "Generic Event Extension" missing on display ":0.0".
QLayout: Attempting to add QLayout "" to QWidget "", which already has a layout
QGraphicsGridLayout::itemAt: invalid row, column 0, 0                          
QGraphicsGridLayout::itemAt: invalid row, column 0, 1                          
QGraphicsGridLayout::itemAt: invalid row, column 0, 2                          
QGraphicsGridLayout::itemAt: invalid row, column 0, 0                          
QGraphicsGridLayout::itemAt: invalid row, column 0, 1                          
QGraphicsGridLayout::itemAt: invalid row, column 0, 2
Object::connect: Attempt to bind non-signal TaskManager::TaskGroup::editRequest()
QCoreApplication::postEvent: Unexpected null receiver
plasma(3934): Communication problem with  "plasma" , it probably crashed.
Error message was:  "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" "

KCrash: Application 'plasma' crashing...
sock_file=/home/musikolo/.kde4/socket-Kalisto/kdeinit4__0
[musikolo@Kalisto ~]$ Xlib:  extension "Generic Event Extension" missing on display ":0.0".
Xlib:  extension "Generic Event Extension" missing on display ":0.0".
Xlib:  extension "Generic Event Extension" missing on display ":0.0".
QLayout: Attempting to add QLayout "" to QWidget "", which already has a layout
QGraphicsGridLayout::itemAt: invalid row, column 0, 0
QGraphicsGridLayout::itemAt: invalid row, column 0, 1
QGraphicsGridLayout::itemAt: invalid row, column 0, 2
QGraphicsGridLayout::itemAt: invalid row, column 0, 0
QGraphicsGridLayout::itemAt: invalid row, column 0, 1
QGraphicsGridLayout::itemAt: invalid row, column 0, 2
Object::connect: Attempt to bind non-signal TaskManager::TaskGroup::editRequest()
QCoreApplication::postEvent: Unexpected null receiver
plasma(3940): Communication problem with  "plasma" , it probably crashed.
Error message was:  "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" "

[musikolo@Kalisto ~]$
---------------------------

* And here a backtrace of the crash (The KDE crash handler):
---------------------------
Application: Plasma Workspace (plasma), signal SIGSEGV
[Current thread is 0 (LWP 3976)]

Thread 3 (Thread 0xa9b87b90 (LWP 3977)):
#0  0xb807e424 in __kernel_vsyscall ()
#1  0xb67a1ab1 in select () from /lib/libc.so.6
#2  0xb6a8dbf7 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00000009 in ?? ()
#4  0xa9b87298 in ?? ()
#5  0x00000000 in ?? ()

Thread 2 (Thread 0xa934ab90 (LWP 3979)):
#0  0xb807e424 in __kernel_vsyscall ()
#1  0xb694cc55 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb69d06a2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb7af7a0a in ?? () from /usr/lib/libQtNetwork.so.4
#4  0x0a127568 in ?? ()
#5  0x0a127564 in ?? ()
#6  0xffffffff in ?? ()
#7  0xb6aa004f in ?? () from /usr/lib/libQtCore.so.4
#8  0xb6b46b10 in ?? () from /usr/lib/libQtCore.so.4
#9  0xb6b46b10 in ?? () from /usr/lib/libQtCore.so.4
#10 0xa934a2f8 in ?? ()
#11 0x00000000 in ?? ()

Thread 1 (Thread 0xb5773710 (LWP 3976)):
[KCrash Handler]
#6  0xb6ac257a in QTimer::stop () from /usr/lib/libQtCore.so.4
#7  0xb804dc97 in PanelView::updatePanelGeometry () from /usr/lib/libkdeinit4_plasma.so
#8  0xb804f4c8 in PanelView::pinchContainment () from /usr/lib/libkdeinit4_plasma.so
#9  0xb8050994 in PanelView::PanelView () from /usr/lib/libkdeinit4_plasma.so
#10 0xb80556d2 in PlasmaApp::createView () from /usr/lib/libkdeinit4_plasma.so
#11 0xb8055906 in PlasmaApp::containmentAdded () from /usr/lib/libkdeinit4_plasma.so
#12 0xb8057c9c in PlasmaApp::qt_metacall () from /usr/lib/libkdeinit4_plasma.so
#13 0xb6abb77b in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0xb6abbcd2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb7f2d6f3 in Plasma::Corona::containmentAdded () from /usr/lib/libplasma.so.3
#16 0xb7f2f098 in Plasma::Corona::loadLayout () from /usr/lib/libplasma.so.3
#17 0xb7f30141 in Plasma::Corona::initializeLayout () from /usr/lib/libplasma.so.3
#18 0xb805455d in PlasmaApp::corona () from /usr/lib/libkdeinit4_plasma.so
#19 0xb8056615 in PlasmaApp::setupDesktop () from /usr/lib/libkdeinit4_plasma.so
#20 0xb8057ccb in PlasmaApp::qt_metacall () from /usr/lib/libkdeinit4_plasma.so
#21 0xb6abb77b in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#22 0xb6abbcd2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#23 0xb6ac2777 in ?? () from /usr/lib/libQtCore.so.4
#24 0x09e2a3c8 in ?? ()
#25 0xb6b45448 in ?? () from /usr/lib/libQtCore.so.4
#26 0x00000000 in ?? ()
---------------------------

I hope you find this bug soon and can fix it.

Thanks a lot for your support.

PS: Some more useful info:
KDE 4.2.1 
Kernel: 2.6.28.7
ArchLinux - i686
AMD 1200 Thunderbird
768 RAM