切西王隨記

The way to solve that ubuntu 13.10 cannot connect to A2DP BT devices...
bluez version: bluez [bluez (4.101-0ubuntu8b1)
pulseaudio version: 4.0

In /etc/bluetooth/audio.conf:
// add Enable=Source which located on the top of audio.conf
[General]
Enable=Source

// modify the value of HFP from true to false
HFP=false

// uncomment the following three lines which located
// in the bottom of audio.conf
[A2DP]
SBCSources=1
MPEG12Sources=0

If it's still not working, try below...
// Test by:
pactl list | grep -i module-bluetooth-discover

// If it's empty, load via below command
pactl load-module module-bluetooth-discover

Pulse audio will then (hopefully) recognize the device

Reference: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1199059