I'm on Ubuntu 8.10, and using KT 3.1.2. And I've been using it for quite a while with no problems at all.

But all of a sudden two nights ago the client crashed. And it won't open back up. The KDE Crash Handler pops ups and says the crash caused Signal 11(SIGSEGV). And when I tick the Show Details box, another windows pops up that says:

Unable to create a valid backtrace.

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.

I had some torrents running when it crashed, so how can I go about fixing this without losing those running torrents? I don't want to update to 3.2final just yet since I just found out one of the trackers I'm using hasn't allowed that version yet(but I put in a request for them to allow, so it should be soon).

So can I simply go into Synaptics, uninstall 3.1.2 and reinstall it, and maybe my .torrents will still be in it?

Thank you for any help.

Reinstalling will not help, install the ktorrent-dbg package so you can generate a valid backtrace. So we can see what is going on.

Ok, this is all I could get out of it. It started, the halfway through I got the same invalid backtrace window again. And yeah, I tried completely removing KT from Synaptics and installing it again, but I still get this crash report when I go to start the client.

I hope I'll be able to get this client running again. It's the best one for Linux.

Code: Select all

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.

[Thread debugging using libthread_db enabled]
[New Thread 0xb5e106c0 (LWP 8725)]
[New Thread 0xb14ccb90 (LWP 8737)]
[New Thread 0xb1ccdb90 (LWP 8736)]
[New Thread 0xb24ceb90 (LWP 8734)]
[New Thread 0xb316cb90 (LWP 8732)]
[New Thread 0xb397db90 (LWP 8730)]
[New Thread 0xb46f1b90 (LWP 8728)]
0xb8015430 in __kernel_vsyscall ()
[Current thread is 0 (LWP 8725)]

Thread 7 (Thread 0xb46f1b90 (LWP 8728)):
#0  0xb8015430 in __kernel_vsyscall ()
#1  0xb67a5f77 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb39a2532 in ?? () from /usr/lib/libpulse.so.0
#3  0xb3994509 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0xb3995cd3 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0xb3995da4 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0xb39a22e3 in ?? () from /usr/lib/libpulse.so.0
#7  0xb39c38e2 in ?? () from /usr/lib/libpulse.so.0
#8  0xb615150f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#9  0xb67b07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 6 (Thread 0xb397db90 (LWP 8730)):
#0  0xb3995891 in pa_mainloop_dispatch () from /usr/lib/libpulse.so.0
#1  0xb3995ce1 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#2  0xb3995da4 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#3  0xb39a22e3 in ?? () from /usr/lib/libpulse.so.0
#4  0xb39c38e2 in ?? () from /usr/lib/libpulse.so.0
#5  0xb615150f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#6  0xb67b07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 5 (Thread 0xb316cb90 (LWP 8732)):
#0  0xb67bedf9 in ?? () from /lib/tls/i686/cmov/libc.so.6
#1  0xb67a5f5d in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb39a2532 in ?? () from /usr/lib/libpulse.so.0
#3  0xb3994509 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0xb3995cd3 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0xb3995da4 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0xb39a22e3 in ?? () from /usr/lib/libpulse.so.0
#7  0xb39c38e2 in ?? () from /usr/lib/libpulse.so.0
#8  0xb615150f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#9  0xb67b07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 4 (Thread 0xb24ceb90 (LWP 8734)):
#0  0xb8015430 in __kernel_vsyscall ()
#1  0xb67a5f77 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb39a2532 in ?? () from /usr/lib/libpulse.so.0
#3  0xb3994509 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0xb3995cd3 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0xb3995da4 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0xb39a22e3 in ?? () from /usr/lib/libpulse.so.0
#7  0xb39c38e2 in ?? () from /usr/lib/libpulse.so.0
#8  0xb615150f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#9  0xb67b07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 3 (Thread 0xb1ccdb90 (LWP 8736)):
#0  0xb8015430 in __kernel_vsyscall ()
#1  0xb67a5f77 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb39a2532 in ?? () from /usr/lib/libpulse.so.0
#3  0xb3994509 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0xb3995cd3 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0xb3995da4 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0xb39a22e3 in ?? () from /usr/lib/libpulse.so.0
#7  0xb39c38e2 in ?? () from /usr/lib/libpulse.so.0
#8  0xb615150f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#9  0xb67b07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xb14ccb90 (LWP 8737)):
#0  0xb8015430 in __kernel_vsyscall ()
#1  0xb67a5f77 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb39a2532 in ?? () from /usr/lib/libpulse.so.0
#3  0xb3994509 in pa_mainloop_poll () from /usr/lib/libpulse.so.0
#4  0xb3995cd3 in pa_mainloop_iterate () from /usr/lib/libpulse.so.0
#5  0xb3995da4 in pa_mainloop_run () from /usr/lib/libpulse.so.0
#6  0xb39a22e3 in ?? () from /usr/lib/libpulse.so.0
#7  0xb39c38e2 in ?? () from /usr/lib/libpulse.so.0
#8  0xb615150f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#9  0xb67b07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5e106c0 (LWP 8725)):
#0  0xb8015430 in __kernel_vsyscall ()
#1  0xb676bde6 in nanosleep () from /lib/tls/i686/cmov/libc.so.6
#2  0xb676bbfe in sleep () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7ac0d72 in KCrash::startDrKonqi (argv=0xbfa14ba4, argc=17) at /build/buildd/kde4libs-4.2.0/kdeui/util/kcrash.cpp:412
#4  0xb7ac1734 in KCrash::defaultCrashHandler (sig=11) at /build/buildd/kde4libs-4.2.0/kdeui/util/kcrash.cpp:337
#5  <signal handler called>
#6  0xb75317f7 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#7  0xb6049fc3 in ?? () from /usr/lib/libphonon.so.4
#8  0xb6033216 in ?? () from /usr/lib/libphonon.so.4
#9  0xb60344aa in ?? () from /usr/lib/libphonon.so.4
#10 0xb6032b85 in ?? () from /usr/lib/libphonon.so.4
#11 0xb3e25e5f in MediaPlayer (this=0x8f034b8, parent=0x8efcc98) at /build/buildd/ktorrent-3.1.2+dfsg.1/plugins/mediaplayer/mediaplayer.cpp:38
#12 0xb3e1ecbb in kt::MediaPlayerPlugin::load (this=0x8efcc98) at /build/buildd/ktorrent-3.1.2+dfsg.1/plugins/mediaplayer/mediaplayerplugin.cpp:109
#13 0xb7fbdde4 in kt::PluginManager::load (this=0x825d208, pi=@0x8e361f0, idx=2) at /build/buildd/ktorrent-3.1.2+dfsg.1/libktcore/pluginmanager.cpp:125
#14 0xb7fbe525 in kt::PluginManager::loadPlugins (this=0x825d208) at /build/buildd/ktorrent-3.1.2+dfsg.1/libktcore/pluginmanager.cpp:89
#15 0xb7fbe811 in kt::PluginManager::loadPluginList (this=0x825d208) at /build/buildd/ktorrent-3.1.2+dfsg.1/libktcore/pluginmanager.cpp:71
#16 0x08079c0b in GUI (this=0x844c528) at /build/buildd/ktorrent-3.1.2+dfsg.1/ktorrent/gui.cpp:126
#17 0x0807ac89 in kt::App::newInstance (this=0xbfa15fec) at /build/buildd/ktorrent-3.1.2+dfsg.1/ktorrent/app.cpp:52
#18 0xb7a5a556 in KUniqueApplicationAdaptor::newInstance (this=0x82aed88, asn_id=@0x82afea0, args=@0x82afc80) at /build/buildd/kde4libs-4.2.0/kdeui/kernel/kuniqueapplication_p.h:77
#19 0xb7a5874e in KUniqueApplicationAdaptor::qt_metacall (this=0x82aed88, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfa156e8)
    at /build/buildd/kde4libs-4.2.0/obj-i486-linux-gnu/kdeui/kuniqueapplication_p.moc:74
#20 0xb6a8526e in ?? () from /usr/lib/libQtDBus.so.4
#21 0xb6a864a7 in ?? () from /usr/lib/libQtDBus.so.4
#22 0xb6a869b1 in ?? () from /usr/lib/libQtDBus.so.4
#23 0xb6a86eaa in ?? () from /usr/lib/libQtDBus.so.4
#24 0xb752b771 in QObject::event () from /usr/lib/libQtCore.so.4
#25 0xb751b7cb in QCoreApplication::event () from /usr/lib/libQtCore.so.4
#26 0xb6c12206 in QApplication::event () from /usr/lib/libQtGui.so.4
#27 0xb6c0c8ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#28 0xb6c1476e in QApplication::notify () from /usr/lib/libQtGui.so.4
#29 0xb7a50fed in KApplication::notify (this=0xbfa15fec, receiver=0xbfa15fec, event=0x8250588) at /build/buildd/kde4libs-4.2.0/kdeui/kernel/kapplication.cpp:307
#30 0xb751be61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#31 0xb751cae5 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#32 0xb751ccdd in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#33 0xb754682f in ?? () from /usr/lib/libQtCore.so.4
#34 0xb619d6f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#35 0xb61a0da3 in ?? () from /usr/lib/libglib-2.0.so.0
#36 0xb61a0f61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#37 0xb7546478 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#38 0xb6ca6ee5 in ?? () from /usr/lib/libQtGui.so.4
#39 0xb751a52a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#40 0xb751a6ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#41 0xb751cda5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#42 0xb6c0c767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#43 0x0806441b in main (argc=4, argv=0xbfa16364) at /build/buildd/ktorrent-3.1.2+dfsg.1/ktorrent/main.cpp:165
#0  0xb8015430 in __kernel_vsyscall ()

It crashes when the mediaplayer plugin tries to create a phonon AudioOutput object, this is a phonon problem, nothing we can do about.

As a workaround, you can disable the plugin by opening ~/.kde/share/config/ktorrentrc and changing :

[Media Player]
MediaPlayerPluginEnabled=true

Into

[Media Player]
MediaPlayerPluginEnabled=false

Beautiful, that did it. My KT is now working again. Thank you so much George.

So...is there no way that I can use the MediaPlayer Plugin? Or will it try to do this phonon thing again and again?

h8uthemost wrote:So...is there no way that I can use the MediaPlayer Plugin? Or will it try to do this phonon thing again and again?

You need to create an AudioOutput object to be able to play something, so this has to happen every time the plugin is loaded.

Well, I don't really know anything about AudioObject, so I guess I just won't be using the media player plug in anymore. But it's not that huge of a deal. It was just a nice little perk from an excellent client.

Thank you for your help George.