Test on HP desktop with following steps

1. Open gnome-control-center and select Wi-Fi
2. Turn off Wi-Fi via UI
3. Select Bluetooth column
4. Turn off Bluetooth via UI
5. Turn Off AirPlane Mode in Bluetooth menu

Bluetooth works fine.

[OS]
Focal

** Tags removed: verification-needed verification-needed-focal
** Tags added: verification-done verification-done-focal

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https://bugs.launchpad.net/bugs/1926062

Title:
  [hirsute/impish] Can't turn bluetooth on again after turning it off

Status in Bluez Utilities:
  Fix Released
Status in GNOME Bluetooth:
  Unknown
Status in OEM Priority Project:
  New
Status in bluez package in Ubuntu:
  Fix Released
Status in gnome-settings-daemon package in Ubuntu:
  Fix Released
Status in bluez source package in Focal:
  Fix Released
Status in gnome-settings-daemon source package in Focal:
  Fix Committed
Status in bluez source package in Hirsute:
  Fix Released
Status in gnome-settings-daemon source package in Hirsute:
  Fix Committed
Status in bluez source package in Impish:
  Fix Released
Status in gnome-settings-daemon source package in Impish:
  Fix Released

Bug description:
  [Impact]

  On/off of Bluetooth in gnome-control-center will not work properly in kernels 
5.11 (approximately) onward. Devices are not refreshed in the list anymore.
   
  [Test Plan]

  1. Open gnome-control-center and select Bluetooth
  2. Turn off Bluetooth via UI
  3. Turn on Bluetooth via UI

  Expect: Device list appears, so Bluetooth really is on.

  [Where problems could occur]

  Since the fix involves the 'rfkill' logic it has the potential to
  affect any Bluetooth or Wifi on/off setting.

  [Other info]

  Upstream bug in gnome-bluetooth:
  https://gitlab.gnome.org/GNOME/gnome-bluetooth/-/issues/38

  Discussion in linux-bluetooth:
  https://marc.info/?t=162004758900003&r=1&w=2

  [Original bug report]

  When ever i Turn on my system or restart bluetooth is open any it
  connects to any device. But when i turn off bluetooth and try to turn
  it on again. it neither turns on nor scans/connects to any device.
  This is happening since I updated my system to ubuntu 21.04 LTS

    Bluetooth: hci0: HCI reset during shutdown failed

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: bluetooth (not installed)
  ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
  Uname: Linux 5.11.0-16-generic x86_64
  ApportVersion: 2.20.11-0ubuntu65
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Apr 25 15:09:23 2021
  InstallationDate: Installed on 2020-12-15 (130 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  InterestingModules: rfcomm bnep btusb bluetooth
  MachineType: LENOVO 80TR
  ProcEnviron:
   LANGUAGE=en_IN:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_IN
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-16-generic 
root=UUID=7c507bd4-c66c-4233-a64e-804f6df5412b ro quiet splash vt.handoff=7
  SourcePackage: bluez
  UpgradeStatus: Upgraded to hirsute on 2021-04-22 (2 days ago)
  dmi.bios.date: 07/31/2017
  dmi.bios.release: 1.29
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 3UCN29WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Nano 5B1
  dmi.board.vendor: LENOVO
  dmi.board.version: No DPK
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo ideapad 110-15AST
  dmi.ec.firmware.release: 1.29
  dmi.modalias: 
dmi:bvnLENOVO:bvr3UCN29WW:bd07/31/2017:br1.29:efr1.29:svnLENOVO:pn80TR:pvrLenovoideapad110-15AST:rvnLENOVO:rnNano5B1:rvrNoDPK:cvnLENOVO:ct10:cvrLenovoideapad110-15AST:
  dmi.product.family: IDEAPAD
  dmi.product.name: 80TR
  dmi.product.sku: LENOVO_MT_80TR_BU_idea_FM_Lenovo ideapad 110-15AST
  dmi.product.version: Lenovo ideapad 110-15AST
  dmi.sys.vendor: LENOVO
  hciconfig:
   hci0:        Type: Primary  Bus: USB
    BD Address: C8:3D:D4:84:E0:06  ACL MTU: 820:8  SCO MTU: 255:16
    DOWN
    RX bytes:744804 acl:76 sco:0 events:105989 errors:0
    TX bytes:51871528 acl:113157 sco:0 commands:192 errors:0

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