Hi all, Thinkpad X1 2015, ubuntu 15.10, the bluetooth module seems not work well. Once connect, it prints the following kernel log: [ 196.730943] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 196.730946] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 196.730948] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 196.740970] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 196.740975] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 196.740976] Bluetooth: hci0 SCO packet for unknown connection handle 0 [ 201.764755] Bluetooth: hci0 SCO packet for unknown connection handle 257 [ 201.764768] Bluetooth: hci0 SCO packet for unknown connection handle 257 [ 201.764777] Bluetooth: hci0 SCO packet for unknown connection handle 257 and something I think related while kernel initing: [ 3.738275] usbcore: registered new interface driver btusb [ 3.754215] Bluetooth: hci0: read Intel version: 370810011003110e00 [ 3.755429] Adding 7999996k swap on /swap/swapfile. Priority:-1 extents:66 across:13275644k SSFS [ 3.757145] Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.8.10-fw-1.10.3.11.e.bseq I think it is a good chance for me to diving into the linux kernel, so can anyone offer some hints that I could solve this problem. $ uname -ar Linux kinka-X1 4.3.0-rc7+ #50 SMP Wed Oct 28 22:49:01 CST 2015 x86_64 x86_64 x86_64 GNU/Linux Many thanks~ Kinka