Bug 183485

Summary: knotify4 crashes and sends SIGSEGV
Product: [Unmaintained] kdelibs Reporter: Hugh Urwin <h.e.urwin>
Component: knotifyAssignee: Olivier Goffart <ogoffart>
Status: RESOLVED DUPLICATE    
Severity: crash CC: andresbajotierra, dglent, kretz
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Hugh Urwin 2009-02-06 23:25:55 UTC 
Version:            (using KDE 4.2.0)
OS:                Linux
Installed from:    Ubuntu Packages

As reported by the OS:
This backtrace appears to be of no use.
This is probably because your packages are built in a way which prevents creation of proper backtraces, or the stack frame was seriously corrupted in the crash.
-----------------------------------------------------------
NOTE: A bug in backtracking system? every backtrace is reported as useless. The system (kubuntu 8.10 - kde 4.2.00) is not broken
-----------------------------------------------------------

a bunch of 
(no debugging symbols found)
follows
[Thread debugging using libthread_db enabled]
[New Thread 0xb67056c0 (LWP 32559)]
more 
(no debugging symbols found)
....
(no debugging symbols found)
0xb80f7430 in __kernel_vsyscall ()
[Current thread is 0 (process 32559)]

Thread 1 (Thread 0xb67056c0 (LWP 32559)):
#0  0xb80f7430 in __kernel_vsyscall ()
#1  0xb6d1df10 in nanosleep () from /lib/tls/i686/cmov/libc.so.6
#2  0xb6d1dd4e in sleep () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7f83d72 in ?? () from /usr/lib/libkdeui.so.5
#4  0xb7f84734 in KCrash::defaultCrashHandler () from /usr/lib/libkdeui.so.5
#5  <signal handler called>
#6  0xb79af7f7 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#7  0xb7d4cfc3 in ?? () from /usr/lib/libphonon.so.4
#8  0xb7d36216 in ?? () from /usr/lib/libphonon.so.4
#9  0xb7d374aa in ?? () from /usr/lib/libphonon.so.4
#10 0xb7d35b85 in ?? () from /usr/lib/libphonon.so.4
#11 0x08053244 in _start ()
#0  0xb80f7430 in __kernel_vsyscall ()

after hours knotify4 started crashing. It might have been concident with going visible on kopete and started receiving messages. I see that even when the backtracing was classed as useless by the OS, phonon seems to be involved in the crash, which sounds reasonable since phonons not working on my system so far and kopete seems to be relying on it. The problem with phonon is that I was using oss on Hardy (and before.. for some years now actually) and phonon doesnt seem to like it. When I changed the backend from xine to gstreamer as someone suggested on some kde forum, the sound configuration applet crashed and those applications relying on phonon (like dragon) will die silently (at least as seen from kde). Right now i can confirm that the knotify is crashing coincidently with some incoming messages from kopete and since the problem appeared after changing the backend to gstreamer...an unproperly configured phonon might be making knotify crash.
Comment 1 Hugh Urwin 2009-02-06 23:28:23 UTC 
pure speculation, of course
Comment 2 Dario Andres 2009-02-06 23:38:17 UTC 
The backtrace is useless as you don't have "debug info" useful to triage and discover where the crash happened.
If you can reproduce the crash at will, may you read http://techbase.kde.org/Development/Tutorials/Debugging/How_to_create_useful_crash_reports and post a complete backtrace here? 
(You may need to install "kdelibs5-dbg","kdebase4-runtime-dbg", "kdebase4-workspace-dbg" and some phonon package)

BTW: selecting the devices on SystemSettings/Multimedia may help you to use OSS.
Thanks :)
Comment 3 Olivier Goffart 2009-02-14 20:23:43 UTC 

*** This bug has been marked as a duplicate of bug 184125 ***
Comment 4 Matthias Kretz 2009-02-15 09:53:58 UTC 

*** This bug has been marked as a duplicate of bug 180109 ***
Comment 5 Dimitrios Glentadakis 2009-02-25 21:03:51 UTC 
i have the same (i think so) knotify crashs very often suddenly

Αυτό το backtrace φαίνεται να είναι άχρηστο.
Αυτό πιθανότατα συμβαίνει γιατί τα πακέτα σας έχουν φτιαχτεί με τέτοιο τρόπο που απαγορεύει τη δημιουργία σωστών backtraces, ή το πλαίσιο της στοίβας καταστράφηκε στην κατάρρευση.

[Thread debugging using libthread_db enabled]
[New Thread 0xb64e26d0 (LWP 6920)]
[New Thread 0xb3295b90 (LWP 7227)]
0xffffe424 in __kernel_vsyscall ()
[Current thread is 1 (Thread 0xb64e26d0 (LWP 6920))]

Thread 2 (Thread 0xb3295b90 (LWP 7227)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb6c8c2d7 in poll () from /lib/i686/libc.so.6
#2  0xb32b6586 in ?? () from /usr/lib/libpulse.so.0
#3  0xb32a8311 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0xb32a9a95 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0xb32a9b74 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0xb32b632e in ?? () from /usr/lib/libpulse.so.0
#7  0xb32d7e53 in ?? () from /usr/lib/libpulse.so.0
#8  0xb6b5d315 in start_thread () from /lib/i686/libpthread.so.0
#9  0xb6c96d4e in clone () from /lib/i686/libc.so.6

Thread 1 (Thread 0xb64e26d0 (LWP 6920)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb6c54ad6 in nanosleep () from /lib/i686/libc.so.6
#2  0xb6c548be in sleep () from /lib/i686/libc.so.6
#3  0xb7e78a2c in KCrash::startDrKonqi (argv=0xbff488d4, argc=17) at /usr/src/debug/kdelibs-4.2.0/kdeui/util/kcrash.cpp:412
#4  0xb7e7924e in KCrash::defaultCrashHandler (sig=11) at /usr/src/debug/kdelibs-4.2.0/kdeui/util/kcrash.cpp:337
#5  <signal handler called>
#6  0xb7888aaf in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#7  0xb7c4a0a5 in ?? () from /usr/lib/libphonon.so.4
#8  0xb7c35e0e in ?? () from /usr/lib/libphonon.so.4
#9  0xb7c36c36 in ?? () from /usr/lib/libphonon.so.4
#10 0xb7c375f8 in ?? () from /usr/lib/libphonon.so.4
#11 0x08054cbf in Player (this=0x95f0700) at /usr/src/debug/kdebase-runtime-4.2.0/knotify/notifybysound.cpp:59
#12 0x08052ead in PlayerPool::getPlayer (this=0x95d9654) at /usr/src/debug/kdebase-runtime-4.2.0/knotify/notifybysound.cpp:99
#13 0x080531aa in NotifyBySound::notify (this=0x95cc020, eventId=26, config=0x95edc08) at /usr/src/debug/kdebase-runtime-4.2.0/knotify/notifybysound.cpp:237
#14 0x0804d68d in KNotify::emitEvent (this=0xbff49b00, e=0x95edc00) at /usr/src/debug/kdebase-runtime-4.2.0/knotify/knotify.cpp:176
#15 0x0804db2e in KNotify::event (this=0xbff49b00, event=@0x95f6a78, appname=@0x95f0150, contexts=@0xbff49138, text=@0x95f65b8, pixmap=@0xbff49118, actions=@0x95f6738, winId=0)
    at /usr/src/debug/kdebase-runtime-4.2.0/knotify/knotify.cpp:126
#16 0x0804dd9e in KNotifyAdaptor::event (this=0x95e8068, event=@0x95f6a78, fromApp=@0x95f0150, contexts=@0x95f6c20, text=@0x95f65b8, image=@0x95f71f0, actions=@0x95f6738, winId=<value optimized out>)
    at /usr/src/debug/kdebase-runtime-4.2.0/knotify/knotify.cpp:235
#17 0x0804e552 in KNotifyAdaptor::qt_metacall (this=0x95e8068, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbff492d8) at /usr/src/debug/kdebase-runtime-4.2.0/build/knotify/knotify.moc:208
#18 0xb797dce5 in ?? () from /usr/lib/libQtDBus.so.4
#19 0xb797f172 in ?? () from /usr/lib/libQtDBus.so.4
#20 0xb797f7e2 in ?? () from /usr/lib/libQtDBus.so.4
#21 0xb797fb38 in ?? () from /usr/lib/libQtDBus.so.4
#22 0xb7882782 in QObject::event () from /usr/lib/libQtCore.so.4
#23 0xb6f23ffc in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#24 0xb6f2c255 in QApplication::notify () from /usr/lib/libQtGui.so.4
#25 0xb7e0ce20 in KApplication::notify (this=0xbff49b14, receiver=0xbff49b00, event=0x953dd90) at /usr/src/debug/kdelibs-4.2.0/kdeui/kernel/kapplication.cpp:307
#26 0xb7872853 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#27 0xb7873535 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#28 0xb787371c in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#29 0xb789e72d in ?? () from /usr/lib/libQtCore.so.4
#30 0xb67ca7ca in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#31 0xb67cdee8 in ?? () from /usr/lib/libglib-2.0.so.0
#32 0xb67ce0a8 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#33 0xb789e34a in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#34 0xb6fc2dca in ?? () from /usr/lib/libQtGui.so.4
#35 0xb7870ec3 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#36 0xb7871081 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#37 0xb78737f2 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#38 0xb6f23e64 in QApplication::exec () from /usr/lib/libQtGui.so.4
#39 0x0804cf93 in main (argc=-1074488204, argv=0x14) at /usr/src/debug/kdebase-runtime-4.2.0/knotify/main.cpp:73