Hello, it looks like i have same bug at this moment I found that UI in rhytmbox is frozen, than i attach to it with gdb gdb backtrace: #0 0xb80d0430 in __kernel_vsyscall () #1 0xb7e94d09 in __lll_lock_wait () from /lib/tls/i686/cmov/libpthread.so.0 #2 0xb7e90114 in _L_lock_89 () from /lib/tls/i686/cmov/libpthread.so.0 #3 0xb7e8fa42 in pthread_mutex_lock () from /lib/tls/i686/cmov/libpthread.so.0 #4 0xb7001f93 in IA__g_static_rec_mutex_lock (mutex=0x9ec10c0) at /build/buildd/glib2.0-2.18.2/glib/gthread.c:313 #5 0xb72b0421 in gst_base_transform_activate (trans=0x9b8cc08, active=166465732) at gstbasetransform.c:2000 #6 0xb72b0602 in gst_base_transform_sink_activate_push (pad=0x9aa5e58, active=0) at gstbasetransform.c:2029 #7 0xb72362bb in gst_pad_activate_push (pad=0x9aa5e58, active=0) at gstpad.c:899 #8 0xb723717d in gst_pad_set_active (pad=0x9aa5e58, active=0) at gstpad.c:668 #9 0xb721c2db in activate_pads (pad=0x9aa5e58, ret=0xbf9cf578, active=0xbf9cf5d8) at gstelement.c:2511 #10 0xb7228f37 in gst_iterator_fold (it=0xa126548, func=0xb721c2b0 , ret=0xbf9cf578, user_data=0xbf9cf5d8) at gstiterator.c:540 #11 0xb721bd5f in iterator_activate_fold_with_resync (iter=0xa126548, func=0xb721c2b0 , user_data=0xbf9cf5d8) at gstelement.c:2543 #12 0xb721be9d in gst_element_pads_activate (element=0x9b8cc08, active=0) at gstelement.c:2587 #13 0xb721c229 in gst_element_change_state_func (element=0x9b8cc08, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2665 #14 0xb3a1184e in ?? () from /usr/lib/libgstaudio-0.10.so.0 #15 0xb72182f8 in gst_element_change_state (element=0x9b8cc08, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2427 #16 0xb721b25c in gst_element_set_state_func (element=0x9b8cc08, state=GST_STATE_READY) at gstelement.c:2377 #17 0xb7217522 in gst_element_set_state (element=0x9b8cc08, state=GST_STATE_READY) at gstelement.c:2280 #18 0xb7208b2a in gst_bin_change_state_func (element=0x9b87350, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstbin.c:1932 #19 0xb72182f8 in gst_element_change_state (element=0x9b87350, transition=GST_STATE_CHANGE_PAUSED_TO_READY) at gstelement.c:2427 #20 0xb721808e in gst_element_continue_state (element=0x9b87350, ret=GST_STATE_CHANGE_SUCCESS) at gstelement.c:2134 #21 0xb72184f3 in gst_element_change_state (element=0x9b87350, transition=GST_STATE_CHANGE_PLAYING_TO_PAUSED) at gstelement.c:2464 #22 0xb721b25c in gst_element_set_state_func (element=0x9b87350, state=GST_STATE_NULL) at gstelement.c:2377 #23 0xb7217522 in gst_element_set_state (element=0x9b87350, state=GST_STATE_NULL) at gstelement.c:2280 #24 0xb807c818 in ?? () from /usr/lib/librhythmbox-core.so.0 #25 0xb807cb74 in ?? () from /usr/lib/librhythmbox-core.so.0 #26 0xb6fd57e1 in g_idle_dispatch (source=0xa0e0388, callback=0xfffffe00, user_data=0x91e2800) at /build/buildd/glib2.0-2.18.2/glib/gmain.c:4235 #27 0xb6fd7718 in IA__g_main_context_dispatch (context=0x8fb0db8) at /build/buildd/glib2.0-2.18.2/glib/gmain.c:2144 #28 0xb6fdadc3 in g_main_context_iterate (context=0x8fb0db8, block=1, dispatch=1, self=0x8f90408) at /build/buildd/glib2.0-2.18.2/glib/gmain.c:2778 #29 0xb6fdb2e2 in IA__g_main_loop_run (loop=0x9a7bca0) at /build/buildd/glib2.0-2.18.2/glib/gmain.c:2986 #30 0xb76c8309 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0 #31 0x08063280 in main () More information about my system: rilium@rilium-laptop:~$ dpkg -l | grep gstream && dpkg -l | grep rhyt ii gstreamer0.10-alsa 0.10.21-3ubuntu0.1 GStreamer plugin for ALSA ii gstreamer0.10-ffmpeg 0.10.5-1 FFmpeg plugin for GStreamer ii gstreamer0.10-plugins-base 0.10.21-3ubuntu0.1 GStreamer plugins from the "base" set ii gstreamer0.10-plugins-good 0.10.10.4-1ubuntu1.1 GStreamer plugins from the "good" set ii gstreamer0.10-plugins-ugly 0.10.9-1ubuntu0.1 GStreamer plugins from the "ugly" set ii gstreamer0.10-pulseaudio 0.10.10.4-1ubuntu1.1 GStreamer plugin for PulseAudio ii gstreamer0.10-x 0.10.21-3ubuntu0.1 GStreamer plugins for X11 and Pango ii libgstreamer-plugins-base0.10-0 0.10.21-3ubuntu0.1 GStreamer libraries from the "base" set ii libgstreamer0.10-0 0.10.21-4 Core GStreamer libraries and elements ii rhythmbox 0.11.6svn20081008-0ubuntu4.3 music player and organizer for GNOME rilium@rilium-laptop:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 8.10 Release: 8.10 Codename: intrepid rilium@rilium-laptop:~$ uname -a Linux rilium-laptop 2.6.27-14-generic #1 SMP Fri Mar 13 18:00:20 UTC 2009 i686 GNU/Linux i have enabled: interpid-updates, interpid-proposed, interpid-backports