Comment 2 for bug 1152241

StacktraceTop:
 pa_context_set_card_profile_by_index (c=0x7fc9aac252d0, idx=<optimized out>, profile=<optimized out>, cb=cb@entry=0x7fc970d41ad0 <_pa_context_set_card_profile_by_index_cb>, userdata=userdata@entry=0x7fc9ab0c1e40) at pulse/introspect.c:1025
 gvc_mixer_card_change_profile (card=0x7fc9ab0c1e40, profile=profile@entry=0x7fc9ab22a730 "a2dp") at gvc-mixer-card.c:250
 gvc_mixer_control_change_profile_on_selected_device (control=0x7fc9aaddc9f0, device=device@entry=0x7fc9ab0c1f20, profile=profile@entry=0x7fc9ab1aea90 "a2dp") at gvc-mixer-control.c:549
 profile_selection_changed (combo_box=<optimized out>, profile=0x7fc9ab1aea90 "a2dp", dialog=0x7fc9aac54640) at gvc-mixer-dialog.c:206
 g_cclosure_marshal_VOID__STRINGv (closure=0x7fc9aac53c20, return_value=<optimized out>, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x7fc9aab828f0) at /build/buildd/glib2.0-2.35.8/./gobject/gmarshal.c:1004