A little script to debug Bluetooth issue.

bt-debug.sh

#!/bin/bash
# -*- coding: utf-8; indent-tabs-mode: nil; tab-width: 2; c-basic-offset: 2; -*-
# vim:fileencodings=utf-8:expandtab:tabstop=2:shiftwidth=2:softtabstop=2
#
# Copyright (C) 2013 Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# sudo service bluetooth stop
# sudo /usr/sbin/bluetoothd -n -d |& ts %.s |& tee bluetoothd.log

set -e

check_cmd ()
{
  if sh -c "$1" > /dev/null 2>&1; then
    true
  else
    if [ -n "$2" ]; then
      sh -c "$2"
    fi
    if which gst-launch >/dev/null 2>&1; then
      gst-launch audiotestsrc ! decodebin ! autoaudiosink
    fi
    false
  fi
}

set_alarm ()
{
  echo '0' > /sys/class/rtc/rtc0/wakealarm
  echo '+5' > /sys/class/rtc/rtc0/wakealarm
  check_cmd "grep \"alarm_IRQ.: yes\" /proc/driver/rtc" "cat /proc/driver/rtc"
  pm-suspend
}

while getopts dl:n:p:s: name; do
  case "$name" in
    (d)
      DUMP='yes'
      ;;
    (l)
      LOOP="$OPTARG"
      ;;
    (n)
      NETWORK="$OPTARG"
      ;;
    (p)
      IP="$OPTARG"
      ;;
    (s)
      SCAN="$OPTARG"
      ;;
  esac
done

while :; do
  echo -en "\r$((++loop))... "
  set_alarm
  check_cmd "rfkill list | grep Bluetooth" "echo There is no Bluetooth device from rfkill list."
  if [ -n "$DUMP" ]; then
    if [ -f "hcidump.$((loop - 2)).raw" ]; then
      rm hcidump.$((loop - 2)).raw
    fi
    hcidump -w hcidump.$loop.raw >/dev/null 2>&1 &
  fi
  [ -n "$SCAN" ] && check_cmd "hcitool scan --refresh | grep $SCAN" "echo hcitool can not find $SCAN"
  [ -n "$NETWORK" ] && check_cmd "nmcli con up id \"$NETWORK\"" "echo can not connect to \"$NETWORK\""
  [ -n "$IP" ] && check_cmd "ping -c 1 $IP" "echo ping $IP failed."
  [ -n "$LOOP" ] && [ $loop -eq $LOOP ] && exit
done