I have also problem with HP x4000b Bluetooth mouse and 64bit Mint 17.1.
hcitool scan
F0:65:DD:66:29:97 HP Bluetooth Mouse X4000b
bluez-simple-agent hci0 F0:65:DD:66:29:97
RequestPinCode (/org/bluez/30956/hci0/dev_F0_65_DD_66_29_97) Enter PIN Code: Creating device failed: org.bluez.Error.AuthenticationFailed: Authentication Failed
Tried again
Creating device failed: org.bluez.Error.ConnectionAttemptFailed: Page Timeout
I have also problem with HP x4000b Bluetooth mouse and 64bit Mint 17.1.
hcitool scan
F0:65:DD:66:29:97 HP Bluetooth Mouse X4000b
bluez-simple-agent hci0 F0:65:DD:66:29:97
RequestPinCode (/org/bluez/ 30956/hci0/ dev_F0_ 65_DD_66_ 29_97) Error.Authentic ationFailed: Authentication Failed
Enter PIN Code: Creating device failed: org.bluez.
Tried again
bluez-simple-agent hci0 F0:65:DD:66:29:97
Creating device failed: org.bluez. Error.Connectio nAttemptFailed: Page Timeout