[Bug 1733426] [NEW] power indicator showing broken icon for wacom tablet device

[Patricio]

Public bug reported:

This is happening on my new Lenovo Thinkpad Yoga 370 laptop running
Ubuntu 16.04.3.

indicator-power shows two devices: the laptop battery and the wacom tablet pen (which reports no battery but I assume this is a problem with the wacom driver).
indicator-power seems to prefer to show the wacom device battery status first, and said device shows a "forbidden" type of icon on the tray. (See screenshot).

upower -d output:

Device: /org/freedesktop/UPower/devices/line_power_AC
  native-path:          AC
  power supply:         yes
  updated:              Mon 20 Nov 2017 06:07:24 PM -03 (1440 seconds ago)
  has history:          no
  has statistics:       no
  line-power
    warning-level:       none
    online:              yes
    icon-name:          'ac-adapter-symbolic'

Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path:          BAT0
  vendor:               LGC
  model:                01AV432
  serial:               1323
  power supply:         yes
  updated:              Mon 20 Nov 2017 06:29:28 PM -03 (116 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               fully-charged
    warning-level:       none
    energy:              50.89 Wh
    energy-empty:        0 Wh
    energy-full:         50.94 Wh
    energy-full-design:  51 Wh
    energy-rate:         0 W
    voltage:             17.247 V
    percentage:          99%
    capacity:            99.8824%
    technology:          lithium-polymer
    icon-name:          'battery-full-charged-symbolic'

Device: /org/freedesktop/UPower/devices/tablet_wacom_battery_0
  native-path:          wacom_battery_0
  model:                Wacom Co.,Ltd. Pen and multitouch sensor
  power supply:         no
  updated:              Mon 20 Nov 2017 06:30:54 PM -03 (30 seconds ago)
  has history:          yes
  has statistics:       yes
  tablet
    warning-level:       action
    percentage:          0%
    icon-name:          'battery-caution-symbolic'

Device: /org/freedesktop/UPower/devices/DisplayDevice
  power supply:         yes
  updated:              Mon 20 Nov 2017 06:07:24 PM -03 (1440 seconds ago)
  has history:          no
  has statistics:       no
  battery
    present:             yes
    state:               fully-charged
    warning-level:       none
    energy:              50.89 Wh
    energy-full:         50.94 Wh
    energy-rate:         0 W
    percentage:          99%
    icon-name:          'battery-full-charged-symbolic'

Daemon:
  daemon-version:  0.99.4
  on-battery:      no
  lid-is-closed:   no
  lid-is-present:  yes
  critical-action: PowerOff

** Affects: indicator-power (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "Screenshot from 2017-11-20 18-32-30.png"
   https://bugs.launchpad.net/bugs/1733426/+attachment/5011829/+files/Screenshot%20from%202017-11-20%2018-32-30.png

** Summary changed:

- power indicator now showing icon for wacom tablet device
+ power indicator showing broken icon for wacom tablet device

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https://bugs.launchpad.net/bugs/1733426

Title:
  power indicator showing broken icon for wacom tablet device

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