I'm experiencing a similar issue on Thinkpad x220 running Linux Mint 18
(based on Ubuntu 16.04) with kernel 4.4.0-21. In my case, rfkill
unblock needs to be called twice in order to fully enable (and soft
unblock) bluetooth:
# rfkill block bluetooth
# rfkill list bluetooth
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: yes
Hard blocked: no
# rfkill unblock bluetooth
# rfkill list bluetooth
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
5: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no
(At this stage, Bluetooth appears to be on in the Mint Bluetooth
configuration dialog but can't see any devices).
# rfkill unblock bluetooth
# rfkill list bluetooth
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
5: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
(Now Bluetooth works fully as expected).
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https://bugs.launchpad.net/bugs/1603715
Title:
bluetooth unavailable after rfkill hard (or soft) unblocking and after
suspend/resume
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