** Changed in: linux (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1769075

Title:
  [regression][bionic] Bluetooth keyboard battery reports 0% (in kernel
  4.15 and later)

Status in bluez package in Ubuntu:
  Invalid
Status in linux package in Ubuntu:
  Fix Released

Bug description:
  I've recently upgraded to 18.04 from 17.10 and after the upgrade "upower -d"
  reports always 0% as battery percentage of the bluetooth Logitech K810 
keyboard.
  Which is a bit annoying since I get a KDE warning on the battery.

  Device: /org/freedesktop/UPower/devices/keyboard_hid_34o88o5do5eo0co2f_battery
    native-path:          hid-34:88:5d:5e:0c:2f-battery
    model:                Logitech K810
    power supply:         no
    updated:              Fri 04 May 2018 09:20:43 AM CEST (51 seconds ago)
    has history:          yes
    has statistics:       yes
    keyboard
      present:             yes
      rechargeable:        yes
      state:               unknown
      warning-level:       none
      percentage:          0%
      icon-name:          'battery-missing-symbolic'

  My guess is that the issue is in the bluetooth rather in the upowerd
  since the reporting in the /sys/devices shows battery level of 0
  --- 
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  bnv        1714 F.... pulseaudio
   /dev/snd/pcmC0D0p:   bnv        1714 F...m pulseaudio
   /dev/snd/controlC0:  bnv        1714 F.... pulseaudio
  CurrentDesktop: KDE
  DistroRelease: Ubuntu 18.04
  HibernationDevice: RESUME=UUID=e962613c-fc88-4740-8f0a-997838d3c2cf
  InstallationDate: Installed on 2017-11-02 (185 days ago)
  InstallationMedia: Kubuntu 17.10 "Artful Aardvark" - Release amd64 
(20171017.1)
  IwConfig:
   lo        no wireless extensions.
   
   enp0s25   no wireless extensions.
  MachineType: Dell Inc. Precision Tower 5810
  NonfreeKernelModules: nvidia_modeset nvidia
  Package: linux (not installed)
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic 
root=UUID=4940c5fe-b600-4f27-8586-c6ac06ccea99 ro vga=773 quiet
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-20-generic N/A
   linux-backports-modules-4.15.0-20-generic  N/A
   linux-firmware                             1.173
  RfKill:
   0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
  Tags:  bionic
  Uname: Linux 4.15.0-20-generic x86_64
  UpgradeStatus: Upgraded to bionic on 2018-04-30 (7 days ago)
  UserGroups: adm cdrom dialout dip kvm lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 05/08/2017
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A19
  dmi.board.name: 0K240Y
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 7
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA19:bd05/08/2017:svnDellInc.:pnPrecisionTower5810:pvr:rvnDellInc.:rn0K240Y:rvrA01:cvnDellInc.:ct7:cvr:
  dmi.product.name: Precision Tower 5810
  dmi.sys.vendor: Dell Inc.

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