KTorrent won't open

[pickl]

Hi there - since this morning every time I try to open ktorrent I get a crash report    If I try to restart it I just get another crash report - I've restarted the computer but that didn't help, I've opened synaptic, clicked reload and mark all upgrades, but I'm already fully up-to-date, and I've tried reinstalling ktorrent but alas without joy.

The crash report states that it is a: Segmentation fault (11) and the developer information tab lists the following debug info (although it also says that this is "probably not useful"  ):

Code:

Application: KTorrent (ktorrent), signal: Segmentation fault
[Current thread is 1 (Thread 0xb78158e0 (LWP 2963))]

Thread 3 (Thread 0xb5624b70 (LWP 2965)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0x4cf08f56 in poll () from /lib/i686/libc.so.6
#2  0x423cdce7 in net::Poll::poll(int) () from /usr/lib/libktorrent.so.3
#3  0x4243abe9 in ?? () from /usr/lib/libktorrent.so.3
#4  0x411d9943 in ?? () from /usr/lib/libQtCore.so.4
#5  0x4cfb4e89 in start_thread () from /lib/i686/libpthread.so.0
#6  0x4cf1540e in clone () from /lib/i686/libc.so.6

Thread 2 (Thread 0xb2fe7b70 (LWP 2966)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0x4cfb902c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/libpthread.so.0
#2  0x453c0d47 in ?? () from /usr/lib/libQtWebKit.so.4
#3  0x4cfb4e89 in start_thread () from /lib/i686/libpthread.so.0
#4  0x4cf1540e in clone () from /lib/i686/libc.so.6

Thread 1 (Thread 0xb78158e0 (LWP 2963)):
[KCrash Handler]
#7  elf_machine_rela_relative (scope=0x8db9e98, reloc_mode=1, consider_profiling=0) at ../sysdeps/i386/dl-machine.h:660
#8  elf_dynamic_do_rela (scope=0x8db9e98, reloc_mode=1, consider_profiling=0) at do-rel.h:105
#9  _dl_relocate_object (scope=0x8db9e98, reloc_mode=1, consider_profiling=0) at dl-reloc.c:268
#10 0x4ce31c06 in dl_open_worker (a=0xbf8aadd0) at dl-open.c:339
#11 0x4ce2e236 in _dl_catch_error (objname=0xbf8aadf8, errstring=0xbf8aadf4, mallocedp=0xbf8aadff, operate=0x4ce31990 <dl_open_worker>, args=0xbf8aadd0) at dl-error.c:178
#12 0x4ce32196 in _dl_open (file=0x8db73f8 "/usr/lib/kde4/ktshutdownplugin.so", mode=-2147483647, caller_dlopen=0x412c5bf4, nsid=-2, argc=3, argv=0xbf8ac454, env=0xbf8ac464) at dl-open.c:571
#13 0x4cfa9b7b in ?? () from /lib/libdl.so.2
#14 0x4ce2e236 in _dl_catch_error (objname=0x88927e4, errstring=0x88927e8, mallocedp=0x88927e0, operate=0x4cfa9ae0, args=0xbf8aafb0) at dl-error.c:178
#15 0x4cfaa2fc in ?? () from /lib/libdl.so.2
#16 0x4cfa9c31 in dlopen () from /lib/libdl.so.2
#17 0x412c5bf4 in ?? () from /usr/lib/libQtCore.so.4
#18 0x412c0814 in ?? () from /usr/lib/libQtCore.so.4
#19 0x41ba899b in KPluginLoader::load() () from /usr/lib/libkdecore.so.5
#20 0x41ba8bbf in KPluginLoader::factory() () from /usr/lib/libkdecore.so.5
#21 0xb787dea1 in kt::PluginManager::load(KPluginInfo const&, int) () from /usr/lib/libktcore.so.12
#22 0xb787e699 in kt::PluginManager::loadPlugins() () from /usr/lib/libktcore.so.12
#23 0xb787e9ef in kt::PluginManager::loadPluginList() () from /usr/lib/libktcore.so.12
#24 0x080789a9 in ?? ()
#25 0x0807a305 in ?? ()
#26 0x42bac567 in ?? () from /usr/lib/libkdeui.so.5
#27 0x42bac63c in ?? () from /usr/lib/libkdeui.so.5
#28 0x410339bd in ?? () from /usr/lib/libQtDBus.so.4
#29 0x41034ba7 in ?? () from /usr/lib/libQtDBus.so.4
#30 0x41035278 in ?? () from /usr/lib/libQtDBus.so.4
#31 0x41035778 in ?? () from /usr/lib/libQtDBus.so.4
#32 0x412eb20f in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#33 0x412d5e3a in QCoreApplication::event(QEvent*) () from /usr/lib/libQtCore.so.4
#34 0x43ba263d in QApplication::event(QEvent*) () from /usr/lib/libQtGui.so.4
#35 0x43b9fe44 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#36 0x43ba4df7 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#37 0x0807a427 in ?? ()
#38 0x412d584e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#39 0x412d95bc in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#40 0x412d970c in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#41 0x41304004 in ?? () from /usr/lib/libQtCore.so.4
#42 0x428f4369 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#43 0x428f4b70 in ?? () from /usr/lib/libglib-2.0.so.0
#44 0x428f4e2a in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#45 0x4130418b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#46 0x43c5694a in ?? () from /usr/lib/libQtGui.so.4
#47 0x412d4a5d in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#48 0x412d4cd9 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#49 0x412d97e0 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#50 0x43b9dbc4 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#51 0x08069361 in _start ()

If anyone has any ideas what the problem might be, or how I might go about fixing it, I'd be very grateful!

Thanks 

[menotu]

Can't duplicate - working fine here pickl

Do you have another user account you can log into and see whether it causes the same behaviour.

Could also try moving your ktorrent folder to somewhere safe and then try opening ktorrent again - you should find it in:

/home/your-name/.kde4/share/apps/ktorrent/

[pickl]

Thanks for the reply menotu - I tried creating a new user account and running it from there, no joy, ditto when I tried moving the folder - a new one was created after I attempted to run ktorrent; I've now removed the new folder and moved the original back so the system is back as it was.

I'm certainly puzzled - it was working fine yesterday but today, no dice 

Anyway, thanks for the suggestion 

[menotu]

When you reinstalled ktorrent did you also install libktorrent - if not mebbe give that a whirl; apart from that I'm out of ideas I'm afraid.

Could try another torrent client from the repos 'til a fix for ktorrent comes along

[pickl]

No, I didn't - sadly I just gave that a try but still no luck 

I guess another client is the only option for now - but I have two (two-part) questions:

when reinstalling I used the "reinstall" option in synaptic - is there anything to be gained from removing ktorrent and libktorrent, then installing them again?  And if I do that, if I copied the ktorrent folder from ~/.kde4/share/apps/ktorrent/ to somewhere safe and then replaced it after the removal/ installation, would I keep the info on what torrents were in progress etc.?

has ktorrent been updated recently? (I'm pretty good for keeping the system updated but was away over the holidays and didn't look through the list of upgrades when I got back - just hit apply.) If so, is there a way for me to go back to an earlier version and see if that works?

Thanks for all your help!

[menotu]

You should be able to move things back and pick up from you left off, but,  it could be a bit iffy in your case as when I did a very quick web search it seemed that the occasional torrent can cause corruption and give ktorrent problems (similar to what you have) and when those torrent downloads have been stopped/removed out of the equation things work again.

I'm pretty sure you can't use Synaptic to go back to an earlier version of ktorrent (sometimes that's possible with video drivers) but not "regular" apps.

If you decide to install something else I would leave both ktorrent and libktorrent installed as they don't take up much HD space and shouldn't interfere the new client (can always uninstall them once the new client has been running okay for a while)

You could run Bleach Bit and clean out your tmp and cache files in case there is any debris lurking around from the torrents

[pickl]

Yes, I had a problem with a corrupt torrent a while back, had to remove it from the ktorrent folder to fix...

So, I've run bleachbit, backed up the ktorrent folder, used synaptic to completely remove ktorrent and libktorrent, then installed them both back and tried to run ktorrent (without restoring the backed up folder) and things are just the same - so I guess it's not an issue with a particular torrent.

I will leave them installed and leave the backup folder where it is in case an update makes ktorrent come back to life - thanks very much for trying to help menotu! 

[johnmart]

If you want to try another torrent client while waiting for ktorrent to work, try qbittorrent. It's in the repos & very nice. I switched from ktorrent last year & never went back. 

[pickl]

Thanks for the tip - I've installed qbittorrent but it's reporting some sort of connection issue, which seems odd as I'm using the same port I used with ktorrent 

I'm starting to wonder whether I'd be as well to wipe the system and reinstall...

[johnmart]

Thanks for the tip - I've installed qbittorrent but it's reporting some sort of connection issue, which seems odd as I'm using the same port I used with ktorrent 

I'm starting to wonder whether I'd be as well to wipe the system and reinstall...

What do you mean by "some sort of connection issue"
What action causes that message?
More specifics will help.