Problema audio avvio Kubuntu

[Fred]

Salve a tutti, tanto per cambiare ho un problema con l'audio in Kubuntu. Quando avvio il sistema non ho nessun suono di benvenuto (nè personalizzato nè "di serie"). La cosa strana è che se avvio amarok o un qualsiasi software per la riproduzione dell'audio tutto si sente a meraviglia (un po' basso a dire la verità).
Qualcuno ha qualche idea?
Grazie a tutti.

[eDog]

Io il suono d'avvio lo sento a metà. Quello di "addio" lo senti, invece? Se si, è un bug di KDE.

[Fred]

No, neppure quello di "addio".

[Fred]

Se può essere utile riporto che tutte le volte che voglio terminare la sessione ho un messaggio d'errore: eccolo con tutti i dettagli.

Codice: Seleziona tutto

Applicazione: KNotify (knotify4), segnale SIGSEGV
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[Thread debugging using libthread_db enabled]
[New Thread 0x7f513e4816f0 (LWP 9514)]
[New Thread 0x40a5d950 (LWP 9515)]
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[KCrash handler]
#5  0x00007f513bdf8690 in strlen () from /lib/libc.so.6
#6  0x00007f513bdc144e in vfprintf () from /lib/libc.so.6
#7  0x00007f513be72d18 in __vsnprintf_chk () from /lib/libc.so.6
#8  0x00007f513381efad in ?? () from /usr/lib/libxine.so.1
#9  0x00007f51338019f4 in xine_log () from /usr/lib/libxine.so.1
#10 0x00007f513380cecc in ?? () from /usr/lib/libxine.so.1
#11 0x00007f5133a80fc2 in ?? () from /usr/lib/kde4/phonon_xine.so
#12 0x00007f5133a845dc in KPluginFactory::createInstance<Phonon::Xine::Backend, QObject> () from /usr/lib/kde4/phonon_xine.so
#13 0x00007f513e01e845 in KPluginFactory::create ()
   from /usr/lib/libkdecore.so.5
#14 0x00007f513561b5b9 in ?? ()
   from /usr/lib/kde4/plugins/phonon_platform/kde.so
#15 0x00007f513561cf0d in ?? ()
   from /usr/lib/kde4/plugins/phonon_platform/kde.so
#16 0x00007f513c4274c8 in ?? () from /usr/lib/libphonon.so.4
#17 0x00007f513c428407 in Phonon::Factory::backend ()
   from /usr/lib/libphonon.so.4
#18 0x00007f513c423cf2 in ?? () from /usr/lib/libphonon.so.4
#19 0x00007f513c42425d in ?? () from /usr/lib/libphonon.so.4
#20 0x00007f513c41e6b0 in ?? () from /usr/lib/libphonon.so.4
#21 0x00007f513c41f341 in Phonon::AudioOutput::AudioOutput ()
   from /usr/lib/libphonon.so.4
#22 0x000000000040cab1 in _start ()
#0  0x00007f513be1e621 in nanosleep () from /lib/libc.so.6


Voi ci capite qualche cosa?
Grazie