i have the same issue. Mine usb adapter is dlink dbt-122.
Here is a snip of dmesg: [138209.665630] Bluetooth: Generic Bluetooth USB driver ver 0.3 [138209.666632] usbcore: registered new interface driver btusb [138214.844410] hci_cmd_task: hci0 command tx timeout [138219.848340] hci_cmd_task: hci0 command tx timeout [138224.853676] hci_cmd_task: hci0 command tx timeout [138229.856417] hci_cmd_task: hci0 command tx timeout [138234.860719] hci_cmd_task: hci0 command tx timeout [138239.960585] hci_cmd_task: hci0 command tx timeout [138240.464277] bluetoothd[5133]: segfault at 3 ip b7e39938 sp bfb8fcc8 error 4 in libc-2.8.90.so[b7dc8000+158000]
# lsusb .. Bus 004 Device 007: ID 2001:f111 D-Link Corp. [hex] DBT-122 Bluetooth adapter ..
i have the same issue. Mine usb adapter is dlink dbt-122.
Here is a snip of dmesg: 8.90.so[ b7dc8000+ 158000]
[138209.665630] Bluetooth: Generic Bluetooth USB driver ver 0.3
[138209.666632] usbcore: registered new interface driver btusb
[138214.844410] hci_cmd_task: hci0 command tx timeout
[138219.848340] hci_cmd_task: hci0 command tx timeout
[138224.853676] hci_cmd_task: hci0 command tx timeout
[138229.856417] hci_cmd_task: hci0 command tx timeout
[138234.860719] hci_cmd_task: hci0 command tx timeout
[138239.960585] hci_cmd_task: hci0 command tx timeout
[138240.464277] bluetoothd[5133]: segfault at 3 ip b7e39938 sp bfb8fcc8 error 4 in libc-2.
# lsusb
..
Bus 004 Device 007: ID 2001:f111 D-Link Corp. [hex] DBT-122 Bluetooth adapter
..