Fedora 11 + KDE+ Sound Problem

[Rick Stevens]

Micros50 wrote:
> I recently installed Fedora 11 to replace fedora 6 which I had been
> running until recently.  Thus far everything looks great. Except for a
> few minor issues everything more or less worked fine.
> 
> My preferred desktop is KDE which also seemed to work well. The
> transition from KDE 3 to KDE4 went smoothly.
> 
> However, I did run into a problem with regards to KDE sound apps. At
> first they were running fine. Any apps that needed to access the KDE
> sound system i.e. "k-notify", "juk", "Amarok", etc. were working fine
> via the "phoneon-backend-xine" backend.
> 
> Then all of a sudden something changed and all kde apps that needed to
> access the sound system started crashing and giving a Signal 6
> (SIGABRT). I didn't recall making any changes or updates that would have
> accounted for this problem.  Here is a copy of the backtrace that I was
> getting each time an application crashed.
> 
> Application: JuK (juk), signal SIGABRT
> [Current thread is 1 (Thread 0xb7f3b780 (LWP 3121))]
> 
> Thread 6 (Thread 0x9940b70 (LWP 3122)):
> #0  0x00843416 in __kernel_vsyscall ()
> #1  0x008162d2 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
> from /lib/libpthread.so.0
> #2  0x05c4674d in ?? () from /usr/lib/libxine.so.1
> #3  0x00811935 in start_thread () from /lib/libpthread.so.0
> #4  0x0074693e in clone () from /lib/libc.so.6
> 
> Thread 5 (Thread 0xb66b1b70 (LWP 3123)):
> [KCrash Handler]
> #6  0x00843416 in __kernel_vsyscall ()
> #7  0x006937c1 in raise () from /lib/libc.so.6
> #8  0x00695092 in abort () from /lib/libc.so.6
> #9  0x057fc84c in qt_message_output(QtMsgType, char const*) ()
> from /usr/lib/libQtCore.so.4
> #10 0x057fc92e in qFatal(char const*, ...) ()
> from /usr/lib/libQtCore.so.4
> #11 0x057fca25 in qt_assert(char const*, char const*, int) ()
> from /usr/lib/libQtCore.so.4
> #12 0x02c5b87f in Phonon::MediaSource::type() const ()
> from /usr/lib/kde4/plugins/phonon_backend/phonon_xine.so
> #13 0x02c5e255 in Phonon::MediaSource::type() const ()
> from /usr/lib/kde4/plugins/phonon_backend/phonon_xine.so
> #14 0x02c642a0 in Phonon::MediaSource::type() const ()
> from /usr/lib/kde4/plugins/phonon_backend/phonon_xine.so
> #15 0x0609a884 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
> () from /usr/lib/libQtGui.so.4
> #16 0x060a1f0e in QApplication::notify(QObject*, QEvent*) ()
> from /usr/lib/libQtGui.so.4
> :
> 
> Any ideas ?  It seems to be an issue with the "phoneon-backend-xine"
> plugin so I switched from the xine backend to gstreamer and all of a
> sudden everything started working again. I had to install some
> additional gstreamer plugins but, at least now everything seems to be
> working again with respect to the KDE sound system.
> 
> I guess we can say the problem is solved in as far as getting sound out
> of my KDE apps but I am still puzzled as to what might have caused the
> xine backend to start giving me problems. Wondering if I might need to
> send a formal bug report. Any suggestions or insignts into this problem
> are appreciated.

There were a number of updates to the sound system (PulseAudio, Alsa)
and a number of the media players that caused problems recently.  I
don't use KDE myself, so I don't recall the details very well as they
didn't bite me (or a later update fixed them and I didn't notice).

I will say that this question is perfect fodder for and can be answered
far more completely on the "fedora-list" than here.  I'd suggest you
search the archives of that list for the last couple of weeks and you
should see how to fix it.  If not, post a message on that list and
you'll get all the help you could possibly want.  The people on that
list are very helpful and a lot of them are heavy-duty KDE users and
mavens.  I'm there, too, if you want to take a few swings at me!  :-)
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- Rick Stevens, Systems Engineer                      ricks at nerd.com -
- AIM/Skype: therps2        ICQ: 22643734            Yahoo: origrps2 -
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-    Admitting you have a problem is the first step toward getting   -
-    medicated for it.      -- Jim Evarts (http://www.TopFive.com)   -
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