我在 Ubuntu 13.10 上遇到蓝牙问题，我不知道从哪里开始寻找。我终于给了一个cat /var/log/syslog | grep -i bluetooth，这就是我得到的（在 a 之后sudo service bluetooth restart）：
Oct 25 19:30:02 razvan-asus bluetoothd[764]: Terminating
Oct 25 19:30:02 razvan-asus bluetoothd[764]: Endpoint unregistered: sender=:1.58 path=/MediaEndpoint/A2DPSink
Oct 25 19:30:02 razvan-asus bluetoothd[764]: Endpoint unregistered: sender=:1.58 path=/MediaEndpoint/A2DPSource
Oct 25 19:30:02 razvan-asus bluetoothd[764]: Endpoint unregistered: sender=:1.58 path=/MediaEndpoint/HFPAG
Oct 25 19:30:02 razvan-asus bluetoothd[764]: Endpoint unregistered: sender=:1.58 path=/MediaEndpoint/HFPHS
Oct 25 19:30:02 razvan-asus bluetoothd[764]: Stopping SDP server
Oct 25 19:30:02 razvan-asus bluetoothd[764]: Exit
Oct 25 19:30:02 razvan-asus bluetoothd[3231]: Bluetooth …