[Bug 1769075] Re: [regression][bionic] Bluetooth keyboard battery reports 0% (in kernel 4.15 and later)

Oops! My post #56 should have said the other synaptics mouse is also OK
on 18.04.1 LTS (not 17.10). I also got the release of cosmic wrong - it
is 18.10, of course!

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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:
Confirmed

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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