plasma crashed with SIGSEGV due to a setting in plasma-appletsrc

[Andreas Blochberger]

Binary package hint: kdebase-workspace

It crashed after login. There is only a black screen, no desktop or widgets. Applications run, compositing works well, but without applets, there is nothing i can do, but pressing Alt-F2 to start anything.

ProblemType: Crash
Architecture: amd64
Disassembly: 0x7fa092844fb5:
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/plasma
NonfreeKernelModules: nvidia
Package: kdebase-workspace-bin 4:4.2.0-0ubuntu6
ProcCmdline: /usr/bin/plasma
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: kdebase-workspace
Stacktrace: #0 0x00007fa092844fb5 in ?? ()
StacktraceTop: ?? ()
ThreadStacktrace:

Title: plasma crashed with SIGSEGV
Uname: Linux 2.6.28-8-generic x86_64
UserGroups: adm admin audio cdrom dialout lpadmin plugdev sambashare

[Andreas Blochberger (andreas-blochberger)]

Starting plasma in a console brings up the following:

andreas@elrond:~$ plasma
<unknown program name>(9191)/ checkComposite: Plasma has an argb visual 0x11ed440 54525953
<unknown program name>(9191)/ checkComposite: Plasma can use COMPOSITE for effects on 0x11e1fd0
KCrash: Application 'plasma' crashing...
plasma(9191): Communication problem with "plasma" , it probably crashed.
Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive areply (timeout by message bus)" "

andreas@elrond:~$ <unknown program name>(9194)/ checkComposite: Plasma has an argb visual 0x1e1a440 54525953
<unknown program name>(9194)/ checkComposite: Plasma can use COMPOSITE for effects on 0x1e0efd0
plasma(9194): Communication problem with "plasma" , it probably crashed.
Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive areply (timeout by message bus)" "

[Andreas Blochberger (andreas-blochberger)]

I#ve created a valgrind log, hope this helps

[Andreas Blochberger (andreas-blochberger)]

And here is the gdb backtrace

[Apport retracing service (apport)]

StacktraceTop:?? ()

[Apport retracing service (apport)]

Thank you for your report!

However, processing it in order to get sufficient information for the
developers failed (it does not generate an useful symbolic stack trace). This
might be caused by some outdated packages which were installed on your system
at the time of the report:

libavcodec52: installed version None, latest version: 3:0.svn20090204-2ubuntu1
libpostproc51: installed version None, latest version: 3:0.svn20090204-2ubuntu1
python-central: installed version 0.6.9ubuntu3, latest version: 0.6.11ubuntu1
libc6: installed version 2.9-0ubuntu11, latest version: 2.9-0ubuntu12
libavutil49: installed version None, latest version: 3:0.svn20090204-2ubuntu1

Please upgrade your system to the latest package versions. If you still
encounter the crash, please file a new report.

Thank you for your understanding, and sorry for the inconvenience!

[Andreas Blochberger (andreas-blochberger)]

I have added a backtrace, and also i have noticed, that this crash does not happen with a newly created user. So some configuration is causing this issue. I will investigate further

[Andreas Blochberger (andreas-blochberger)]

If i delete the attached file plasma-appletsrc from .kde/share/config, the crash won't happen

[Andreas Blochberger (andreas-blochberger)]

After deleting plasma-appletsrc i have tried to reconfigure my desktop, as it was before. The crash still does not happen anymore, but i cannot figure out, which setting was responsible for the crash, so i attach the new plasma-appletsrc for examination

[Jonathan Thomas (echidnaman)]

It was the Quicklaunch applet. :)

[Jonathan Thomas (echidnaman)]

Did you have the quicklaunch applet in the panel? There's a bug with it that causes it to crash Plasma in Qt 4.5.

[Jonathan Thomas (echidnaman)]

Ugh, wrong bug.