After running "rfkill unblock 3" please then run:

  rfkill list

and send us the output.

** Also affects: gnome-bluetooth (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: gnome-bluetooth (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1782893

Title:
  Bluetooth not working on Dell XPS 15

Status in bluez package in Ubuntu:
  Incomplete
Status in gnome-bluetooth package in Ubuntu:
  Incomplete
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Bluetooth doesn't work on the Dell XPS 15 laptop, with Ubuntu 18.04.

  expected behavior:

  in Settings, one goes to the Bluetooth tab, slides the 'ON' button to
  'ON', and then Bluetooth is enabled, and one can pair devices

  what is happening:

  in Settings, when clicking on the 'ON' button in the Bluetooth tab, it
  seems to turn on, that falls back to off

  some relevant output:

  $ uname -a; lspci -nnk | grep -iA2 net; lsusb; dmesg | grep -i bluetooth; 
dmesg | grep -i firmware; lsmod | grep bluetoothLinux
  Linux dell-xps15 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 18:02:16 UTC 
2018 x86_64 x86_64 x86_64 GNU/Linux
  02:00.0 Network controller [0280]: Qualcomm Atheros QCA6174 802.11ac Wireless 
Network Adapter [168c:003e] (rev 32)
        Subsystem: Bigfoot Networks, Inc. QCA6174 802.11ac Wireless Network 
Adapter [1a56:1535]
        Kernel driver in use: ath10k_pci
        Kernel modules: ath10k_pci
  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 001 Device 004: ID 138a:0091 Validity Sensors, Inc. 
  Bus 001 Device 003: ID 0cf3:e300 Atheros Communications, Inc. 
  Bus 001 Device 005: ID 0c45:6713 Microdia 
  Bus 001 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  [    3.905518] Bluetooth: Core ver 2.22
  [    3.905532] Bluetooth: HCI device and connection manager initialized
  [    3.905534] Bluetooth: HCI socket layer initialized
  [    3.905536] Bluetooth: L2CAP socket layer initialized
  [    3.905539] Bluetooth: SCO socket layer initialized
  [    0.028000] Spectre V2 : Enabling Restricted Speculation for firmware calls
  [    0.068684] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
  [    1.460567] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_01.bin 
(v1.1)
  [    3.857792] ath10k_pci 0000:02:00.0: Direct firmware load for 
ath10k/pre-cal-pci-0000:02:00.0.bin failed with error -2
  [    3.857799] ath10k_pci 0000:02:00.0: Direct firmware load for 
ath10k/cal-pci-0000:02:00.0.bin failed with error -2
  [    3.860582] ath10k_pci 0000:02:00.0: firmware ver 
WLAN.RM.4.4.1-00079-QCARMSWPZ-1 api 6 features wowlan,ignore-otp crc32 fd869beb
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  am         5501 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 18.04
  HibernationDevice: RESUME=UUID=2e64cf71-cb2d-491f-b8cd-fef8c3aeb582
  InstallationDate: Installed on 2017-10-23 (272 days ago)
  InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 
(20170801)
  MachineType: Dell Inc. XPS 15 9560
  NonfreeKernelModules: nvidia_modeset nvidia
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-23-generic 
root=UUID=a991df19-cc0a-4108-b718-c90ef7113f52 ro quiet splash vt.handoff=1
  ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-23-generic N/A
   linux-backports-modules-4.15.0-23-generic  N/A
   linux-firmware                             1.173.1
  Tags:  bionic
  Uname: Linux 4.15.0-23-generic x86_64
  UpgradeStatus: Upgraded to bionic on 2018-06-20 (32 days ago)
  UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 04/23/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.9.4
  dmi.board.name: 05FFDN
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.9.4:bd04/23/2018:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn05FFDN:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 15 9560
  dmi.sys.vendor: Dell Inc.

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