Starting program: /home/user/Documents/AmateurRadio/sdr/rtl-sdr/build/src/rtl_fm -f 105040000 -f 88500000 -l 20 -g 24 -s 28800 -r 28800 > /dev/null
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000457

Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle
Found Elonics E4000 tuner
Oversampling input by: 35x.
Oversampling output by: 1x.
Buffer size: 8.13ms
Tuned to 105292000 Hz.
Sampling at 1008000 Hz.
Output at 28800 Hz.
Exact sample rate is: 1008000.009613 Hz
Tuner gain set to 24.00 dB.
[New Thread 0xb7d83b40 (LWP 19459)]
^C
Program received signal SIGINT, Interrupt.
0xb7fdd424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fdd424 in __kernel_vsyscall ()
#1  0xb7f865a2 in __lll_lock_wait ()
    at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/lowlevellock.S:142
#2  0xb7f81ead in _L_lock_686 () from /lib/i386-linux-gnu/libpthread.so.0
#3  0xb7f81cf3 in __pthread_mutex_lock (
    mutex=mutex@entry=0x804e114 <data_write>) at pthread_mutex_lock.c:61
#4  0x08049fc4 in rtlsdr_callback (ctx=0xbfe3dd9c, len=16384,
    buf=0x8093658 "~~}\200\177\201\200\203~\200\177}v\203v\206\201\203|\202|}~~\177\177\177\177\202\200~\200{\203\201\201\177\177\177\177\204\200\200}~~\202\201\205\201\200~|\177}~\201\201\202~z\177\177\201}}}\201\201\204\177\200\202\201{\177{|z\200}~|~}{~\201\203\201\200\200y\177\205\177\202~\202\203\206\211\177{}\203\200\203\201{}|\200~}}|\201\177\201\203\200\200\202\177\177}\201\177\204\200\177|~\201\177\177\177|\177}\200\201\201\202~\177}\203\203\177\177~\200\177\202\201~~|\200}~}}\201\177\203z\177|\202{\177\177\201\202\201}\200\200\205\203\204\203\201~\200\177\204{\203\177|\203\177\201\200~\201"...)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/rtl_fm.c:643
#5  rtlsdr_callback (
    buf=0x8093658 "~~}\200\177\201\200\203~\200\177}v\203v\206\201\203|\202|}~~\177\177\177\177\202\200~\200{\203\201\201\177\177\177\177\204\200\200}~~\202\201\205\201\200~|\177}~\201\201\202~z\177\177\201}}}\201\201\204\177\200\202\201{\177{|z\200}~|~}{~\201\203\201\200\200y\177\205\177\202~\202\203\206\211\177{}\203\200\203\201{}|\200~}}|\201\177\201\203\200\200\202\177\177}\201\177\204\200\177|~\201\177\177\177|\177}\200\201\201\202~\177}\203\203\177\177~\200\177\202\201~
~|\200}~}}\201\177\203z\177|\202{\177\177\201\202\201}\200\200\205\203\204\203\201~\200\177\204{\203\177|\203\177\201\200~\201"..., len=16384, ctx=0xbfe3dd9c)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/rtl_fm.c:636
#6  0xb7fc8415 in _libusb_callback (xfer=0x804f964)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/librtlsdr.c:1528
#7  0xb7d94f55 in ?? () from /lib/i386-linux-gnu/libusb-1.0.so.0
#8  0xb7d9905a in ?? () from /lib/i386-linux-gnu/libusb-1.0.so.0
#9  0xb7d94c6a in ?? () from /lib/i386-linux-gnu/libusb-1.0.so.0
#10 0xb7d95a51 in libusb_handle_events_timeout_completed ()
   from /lib/i386-linux-gnu/libusb-1.0.so.0
#11 0xb7d95bbb in libusb_handle_events_timeout ()
   from /lib/i386-linux-gnu/libusb-1.0.so.0
#12 0xb7fc8140 in rtlsdr_read_async (dev=0x804f008,
    cb=cb@entry=0x8049f90 <rtlsdr_callback>, ctx=ctx@entry=0xbfe3dd9c,
    buf_num=buf_num@entry=32, buf_len=16384)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/librtlsdr.c:1657
#13 0x0804998a in main (argc=13, argv=0xbffff274)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/rtl_fm.c:939
(gdb)
(gdb) thread 2
[Switching to thread 2 (Thread 0xb7d83b40 (LWP 19459))]
#0  0xb7fdd424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fdd424 in __kernel_vsyscall ()
#1  0xb7f83d13 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_timedwait.S:236
#2  0xb7d954e4 in libusb_wait_for_event ()
   from /lib/i386-linux-gnu/libusb-1.0.so.0
#3  0xb7d95aa8 in libusb_handle_events_timeout_completed ()
   from /lib/i386-linux-gnu/libusb-1.0.so.0
#4  0xb7d95b4b in libusb_handle_events_completed ()
   from /lib/i386-linux-gnu/libusb-1.0.so.0
#5  0xb7d9668e in libusb_control_transfer ()
   from /lib/i386-linux-gnu/libusb-1.0.so.0
#6  0xb7fc41bc in rtlsdr_write_array (len=2 '\002',
    array=0xb7d831ee "\tb\204\004@\267h\004@\267", addr=<optimized out>,
    dev=<optimized out>, block=<optimized out>)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/librtlsdr.c:338
#7  rtlsdr_i2c_write_reg (val=<optimized out>, reg=<optimized out>,
    i2c_addr=<optimized out>, dev=<optimized out>)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/librtlsdr.c:353
#8  e4k_reg_write (e4k=e4k@entry=0x804f054, reg=reg@entry=9 '\t', val=98 'b')
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/librtlsdr.c:370
#9  0xb7fc902a in e4k_tune_params (e4k=e4k@entry=0x804f054,
    p=p@entry=0xb7d8328c)
---Type <return> to continue, or q <return> to quit---
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/tuner_e4k.c:531
#10 0xb7fc9967 in e4k_tune_freq (e4k=e4k@entry=0x804f054,
    freq=freq@entry=88752000)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/tuner_e4k.c:576
#11 0xb7fc3ac6 in e4000_set_freq (dev=0x804f008, freq=88752000)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/librtlsdr.c:113
#12 0xb7fc60d5 in rtlsdr_set_center_freq (dev=0x804f008, freq=88752000)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/librtlsdr.c:796
#13 0x0804b272 in optimal_settings (freq=1, fm=0xbfe3dd9c,
    hopping=<optimized out>)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/rtl_fm.c:551
#14 full_demod (fm=fm@entry=0xbfe3dd9c)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/rtl_fm.c:626
#15 0x0804b325 in demod_thread_fn (arg=0xbfe3dd9c)
    at /home/user/Documents/AmateurRadio/sdr/rtl-sdr/src/rtl_fm.c:656
#16 0xb7f7fd4c in start_thread (arg=0xb7d83b40) at pthread_create.c:308
#17 0xb7e90d3e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130