(gdb) thread apply all bt

Thread 3 (Thread -1234109536 (LWP 21339)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7619a8c in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb6f80272 in pi_usb_impl_init () from /usr/lib/libpisock.so.9
#3  0xb6f804b3 in pi_usb_impl_init () from /usr/lib/libpisock.so.9
#4  0xb6f9bfda in slp_rx () from /usr/lib/libpisock.so.9
#5  0xb6f95cda in padp_tx () from /usr/lib/libpisock.so.9
#6  0xb6f9e389 in pi_send () from /usr/lib/libpisock.so.9
#7  0xb6f9e4a4 in pi_write () from /usr/lib/libpisock.so.9
#8  0xb6f840c3 in dlp_request_write () from /usr/lib/libpisock.so.9
#9  0xb6f84249 in dlp_exec () from /usr/lib/libpisock.so.9
#10 0xb6f84ac3 in dlp_ReadSysInfo () from /usr/lib/libpisock.so.9
#11 0xb75f3a70 in DeviceCommThread::acceptDevice (this=0x81085e8)
    at /home/brad/kpilot/lib/kpilotdevicelink.cc:543
#12 0xb75f4734 in DeviceCommThread::open (this=0x81085e8, device=@0x8106c78)
    at /home/brad/kpilot/lib/kpilotdevicelink.cc:441
#13 0xb75f4c62 in DeviceCommThread::openDevice (this=0x81085e8)
    at /home/brad/kpilot/lib/kpilotdevicelink.cc:342
#14 0xb75f4ef8 in DeviceCommThread::run (this=0x81085e8)
    at /home/brad/kpilot/lib/kpilotdevicelink.cc:642
#15 0xb79b4101 in QThreadInstance::start () from /usr/lib/libqt-mt.so.3
---Type <return> to continue, or q <return> to quit---
#16 0xb7616504 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#17 0xb6dfe51e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread -1246274656 (LWP 21350)):
#0  0xb68fd5d8 in usb_os_find_busses () from /lib/libusb-0.1.so.4
#1  0xb6f7f492 in pi_usb_impl_init () from /usr/lib/libpisock.so.9
#2  0xb7616504 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#3  0xb6dfe51e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread -1232877376 (LWP 21338)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb6df7321 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7962995 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#3  0xb79d625e in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#4  0xb79d606e in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#5  0xb79bd731 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#6  0x08079b24 in main (argc=134754160, argv=0xbff32fa4)
    at /home/brad/kpilot/kpilot/pilotDaemon.cc:1400