interestingly, bluez was not yet installed. after installing, I see:

$ bluetoothctl
[NEW] Controller 9C:B6:D0:FE:37:CA dell-xps15 [default]
Agent registered
[bluetooth]# list
Controller 9C:B6:D0:FE:37:CA dell-xps15 [default]
[bluetooth]# power on
Changing power on succeeded
[bluetooth]# scan on
Discovery started
[CHG] Controller 9C:B6:D0:FE:37:CA Discovering: yes
[NEW] Device 48:22:B7:D2:B1:52 48-22-B7-D2-B1-52
[NEW] Device 6A:D9:FF:E8:DF:F9 6A-D9-FF-E8-DF-F9
[NEW] Device 44:CA:BD:00:6B:53 44-CA-BD-00-6B-53
[NEW] Device 4A:75:85:93:D4:F6 4A-75-85-93-D4-F6
...


and then it also shows devices on the Bluetooth tab in Settings. so this is great progress.


but not all is right. if I pair it with for example a Bluetooth headset, it seems to pair, the it's 'Connected' for a second, and then it won't ever connect.

this is the log:


[CHG] Device 70:26:05:87:EC:01 TxPower: 4
[CHG] Device 70:26:05:87:EC:01 Name: WH-1000XM2
[CHG] Device 70:26:05:87:EC:01 Alias: WH-1000XM2
[CHG] Device 70:26:05:87:EC:01 Class: 0x00240404
[CHG] Device 70:26:05:87:EC:01 Icon: audio-card
[CHG] Device 70:26:05:87:EC:01 Modalias: usb:v054Cp0C67d0105
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000111e-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 00001108-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000110b-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000110d-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 00001131-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000110f-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 00000000-deca-fade-deca-deafdecacaff
[CHG] Device 48:22:B7:D2:B1:52 RSSI: -68
[CHG] Device 48:22:B7:D2:B1:52 ManufacturerData Key: 0x004c
[CHG] Device 48:22:B7:D2:B1:52 ManufacturerData Value:
  10 02 07 00                                      ....            
[CHG] Device 7C:58:67:01:4A:D2 RSSI: -75
[CHG] Device 7C:58:67:01:4A:D2 ManufacturerData Key: 0x004c
[CHG] Device 7C:58:67:01:4A:D2 ManufacturerData Value:
  0c 0e 08 6b c0 31 b0 2f e1 f1 ca 34 92 c6 17 b5  ...k.1./...4....
[CHG] Device 48:22:B7:D2:B1:52 RSSI: -60
[CHG] Device 6A:D9:FF:E8:DF:F9 RSSI: -60
[CHG] Device 70:26:05:87:EC:01 TxPower: -13
[CHG] Device 70:26:05:87:EC:01 Name: LE_WH-1000XM2
[CHG] Device 70:26:05:87:EC:01 Alias: LE_WH-1000XM2
[CHG] Device 44:CA:BD:00:6B:53 RSSI: -76
[CHG] Device 70:26:05:87:EC:01 RSSI: -56
[CHG] Device 70:26:05:87:EC:01 TxPower: 4
[CHG] Device 70:26:05:87:EC:01 Name: WH-1000XM2
[CHG] Device 70:26:05:87:EC:01 Alias: WH-1000XM2
[CHG] Device 70:26:05:87:EC:01 Connected: yes
[CHG] Device 70:26:05:87:EC:01 Modalias: usb:v054Cp0C67d0201
[CHG] Device 70:26:05:87:EC:01 UUIDs: 00000000-deca-fade-deca-deafdecacaff
[CHG] Device 70:26:05:87:EC:01 UUIDs: 00001108-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000110b-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 0000111e-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 00001200-0000-1000-8000-00805f9b34fb
[CHG] Device 70:26:05:87:EC:01 UUIDs: 7b265b0e-2232-4d45-bef4-bb8ae62f813d
[CHG] Device 70:26:05:87:EC:01 UUIDs: 81c2e72a-0591-443e-a1ff-05f988593351
[CHG] Device 70:26:05:87:EC:01 UUIDs: 96cc203e-5068-46ad-b32d-e316f5e069ba
[CHG] Device 70:26:05:87:EC:01 UUIDs: b9b213ce-eeab-49e4-8fd9-aa478ed1b26b
[CHG] Device 70:26:05:87:EC:01 UUIDs: f8d1fbe4-7966-4334-8024-ff96c9330e15
[CHG] Device 70:26:05:87:EC:01 ServicesResolved: yes
[CHG] Device 70:26:05:87:EC:01 Paired: yes
[CHG] Device 70:26:05:87:EC:01 Trusted: yes
[CHG] Device 70:26:05:87:EC:01 ServicesResolved: no
[CHG] Device 70:26:05:87:EC:01 Connected: no