I have a Lenovo B5400 with Windows 8 and Ubuntu 14.04 in dual boot.
My bluetooth works well under Win but with Ubuntu it is not able to detect any device. hcitool scan
does a scan but doesn't detect anything
hciconfig --all:
BD Address: A4:DB:30:9E:43:BB ACL MTU: 820:8 SCO MTU: 255:16
UP RUNNING PSCAN ISCAN
RX bytes:901 acl:0 sco:0 events:42 errors:0
TX bytes:994 acl:0 sco:0 commands:42 errors:0
Features: 0xff 0xff 0xff 0xfe 0xdb 0xff 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF PARK
Link mode: SLAVE ACCEPT
Name: 'ubuntu-0'
Class: 0x700100
Service Classes: Object Transfer, Audio, Telephony
Device Class: Computer, Uncategorized
HCI Version: 4.0 (0x6) Revision: 0xb
LMP Version: 4.0 (0x6) Subversion: 0x8723
Manufacturer: Realtek Semiconductor Corporation (93)
rfkill list
1: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
Do you see any anomalies?
/var/log/syslog
and/var/log/kern.log
for errors. Also see bug #1284649 - bluetooth devices no longer connect to the system