.
Thread 3 (process 6901):
#0  0x00007fd2bda29ba3 in *__GI___poll (fds=<value optimized out>, 
    nfds=<value optimized out>, timeout=6447)
    at ../sysdeps/unix/sysv/linux/poll.c:87
	resultvar = <value optimized out>
	_a3 = 6447
	_a2 = 10
	_a1 = 27945296
	oldtype = 0
	result = <value optimized out>
#1  0x00007fd2bdf184fc in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#2  0x00007fd2bdf18b75 in g_main_loop_run () from /lib/libglib-2.0.so.0
No symbol table info available.
#3  0x00007fd2c0551a37 in IA__gtk_main ()
    at /build/buildd/gtk+2.0-2.19.3/gtk/gtkmain.c:1219
	tmp_list = (GList *) 0x1a758a0
	functions = (GList *) 0x0
	init = (GtkInitFunction *) 0x17b8010
	loop = <value optimized out>
#4  0x000000000044b774 in brasero_app_run_mainwin (app=0x17b8010)
    at brasero-app.c:1852
	uapp = (UniqueApp *) 0x1a758a0
#5  0x00000000004215ac in main (argc=1, argv=0x7fffb9edbd98) at main.c:437
	context = <value optimized out>
.
Thread 2 (process 6914):
#0  0x00007fd2c1403a39 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
No symbol table info available.
#1  0x00007fd2c1c7d672 in ?? () from /usr/lib/libgthread-2.0.so.0
No symbol table info available.
#2  0x00007fd2bdef010f in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#3  0x00007fd2bdef021f in g_async_queue_timed_pop ()
   from /lib/libglib-2.0.so.0
No symbol table info available.
#4  0x00007fd2bdf3f4e0 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#5  0x00007fd2bdf3df74 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#6  0x00007fd2c13feb14 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#7  0x00007fd2bda3605d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#8  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (process 6908):
#0  brasero_sense_data_process (sense_data=0x7fd2b71c11a0 "p", err=0x0)
    at scsi-sense-data.c:118
No locals.
#1  0x00007fd2c30922cb in brasero_scsi_command_issue_sync (
    command=<value optimized out>, buffer=<value optimized out>, 
    size=<value optimized out>, error=0x0) at scsi-sg.c:132
	sense_buffer = "p\000\002\000\000\000\000\n\000\000\000\000:\000\000\000\000\000"
	transport = {interface_id = 83, dxfer_direction = -3, 
  cmd_len = 12 '\f', mx_sb_len = 19 '\023', iovec_count = 0, 
  dxfer_len = 2048, dxferp = 0x7fd2b71c1250, cmdp = 0x17b4220 "�", 
  sbp = 0x7fd2b71c11a0 "p", timeout = 0, flags = 0, pack_id = 0, 
  usr_ptr = 0x0, status = 2 '\002', masked_status = 1 '\001', 
  msg_status = 0 '\0', sb_len_wr = 18 '\022', host_status = 0, 
  driver_status = 8, resid = 0, duration = 3580, info = 1}
#2  0x00007fd2c308052a in brasero_mmc1_read_block (
    handle=<value optimized out>, user_data=<value optimized out>, 
    type=<value optimized out>, header=<value optimized out>, 
    channel=<value optimized out>, start=2048, size=1, 
    buffer=0x7fd2b71c1250 "", buffer_len=2048, error=0x0)
    at scsi-read-cd.c:149
	cdb = (BraseroReadCDCDB *) 0x17b4220
	res = <value optimized out>
#3  0x00007fd2c30878c3 in brasero_medium_track_written_SAO (handle=0x17c4fe0, 
    track_num=1, track_start=0) at brasero-medium.c:1576
	buffer = '\0' <repeats 2047 times>
	result = <value optimized out>
#4  0x00007fd2c308803c in brasero_medium_get_sessions_info (self=0x15c9e80, 
    handle=0x17c4fe0, code=<value optimized out>) at brasero-medium.c:1728
	num = 2
	i = 0
	size = <value optimized out>
	multisession = <value optimized out>
	result = <value optimized out>
	desc = (BraseroScsiTocDesc *) 0x17cd0c4
	toc = (BraseroScsiFormattedTocData *) 0x17cd0c0
#5  0x00007fd2c3089ef4 in brasero_medium_init_real (object=0x15c9e80, 
    handle=0x17c4fe0) at brasero-medium.c:2288
	i = <value optimized out>
	name = <value optimized out>
	result = <value optimized out>
	priv = (BraseroMediumPrivate *) 0x15c9ea0
	code = BRASERO_SCSI_ERR_UNKNOWN
	buffer = '\0' <repeats 255 times>
#6  0x00007fd2c308a21c in brasero_medium_probe_thread (self=0x15c9e80)
    at brasero-medium.c:3044
	counter = <value optimized out>
	wait_time = {tv_sec = 140542991935248, tv_usec = 140543100579144}
	device = <value optimized out>
	code = BRASERO_SCSI_ERR_UNKNOWN
	priv = (BraseroMediumPrivate *) 0x15c9ea0
	handle = (BraseroDeviceHandle *) 0x17c4fe0
#7  0x00007fd2bdf3df74 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#8  0x00007fd2c13feb14 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#9  0x00007fd2bda3605d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#10 0x0000000000000000 in ?? ()
No symbol table info available.