GNOME Shell shows outdated battery level for about a minute after a resume

[Marius Gedminas]

Steps to reproduce:

1. Let the battery run down so only 1 bar is showing (for dramatic effect).
2. Suspend the laptop
3. Plug in A/C power
4. Let the laptop charge overnight
5. Resume the laptop

Expected behavior:

- The battery level shows 100%

Actual behavior:

- The battery level shows 1 bar, leading to thoughts like "omg did I forget to plug it in? is my A/C charger broken?", and then, about 60 seconds later, suddenly jumps to 100%.

Since step 4 is rather long, for ease of reproduction you can use a different method:

1. Unplug A/C power, verify that the battery icon changes accordingly
2. Suspend laptop
3. Plug A/C power
4. Resume laptop

Expect: battery icon shows A/C power is on
Actual: battery icon shows battery for ~60 seconds, until the next poll interval, leading to the same kinds of stressful thoughts ("omg is it broken? did I forget to plug the other end into a wall outlet?").

[Tim Lunn (darkxst)]

is upower reporting the stale value? or gnome-shell taking time to poll?

you should be able to use `upower -d` or so to check.

[Marius Gedminas (mgedmin)]

It is upower.

I followed the reproduction steps (battery at one bar out of four, suspended, plugged in to charge fully, unplugged, resumed).

It took me maybe 10 seconds to unlock the screen and open a terminal. I marked the time and ran upower -d:

mg@platonas: ~ $ date
Št Spa 3 12:39:49 EEST 2015

mg@platonas: ~ $ upower -d
Device: /org/freedesktop/UPower/devices/line_power_AC
  native-path: AC
  power supply: yes
  updated: 2015 m. spalio 02 d. 15:42:21 (75450 seconds ago)
  has history: no
  has statistics: no
  line-power
    warning-level: none
    online: no
    icon-name: 'ac-adapter-symbolic'

Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path: BAT0
  vendor: SANYO
  model: 42T4940
  serial: 13862
  power supply: yes
  updated: 2015 m. spalio 02 d. 19:21:57 (62274 seconds ago)
  has history: yes
  has statistics: yes
  battery
    present: yes
    rechargeable: yes
    state: discharging
    warning-level: none
    energy: 15,81 Wh
    energy-empty: 0 Wh
    energy-full: 59,04 Wh
    energy-full-design: 93,24 Wh
    energy-rate: 11,276 W
    voltage: 11,121 V
    time to empty: 1,4 hours
    percentage: 26%
    capacity: 63,3205%
    technology: lithium-ion
    icon-name: 'battery-low-symbolic'

Device: /org/freedesktop/UPower/devices/DisplayDevice
  power supply: yes
  updated: 2015 m. spalio 02 d. 19:21:57 (62274 seconds ago)
  has history: no
  has statistics: no
  battery
    present: yes
    state: discharging
    warning-level: none
    energy: 15,81 Wh
    energy-full: 59,04 Wh
    energy-rate: 11,276 W
    time to empty: 1,4 hours
    percentage: 26%
    icon-name: 'battery-low-symbolic'

Daemon:
  daemon-version: 0.99.3
  on-battery: yes
  lid-is-closed: no
  lid-is-present: yes
  critical-action: HybridSleep

Then I waited for the battery icon in gnome-shell to update and re-ran the two commands:

mg@platonas: ~ $ upower -d
Device: /org/freedesktop/UPower/devices/line_power_AC
  native-path: AC
  power supply: yes
  updated: 2015 m. spalio 02 d. 15:42:21 (75475 seconds ago)
  has history: no
  has statistics: no
  line-power
    warning-level: none
    online: no
    icon-name: 'ac-adapter-symbolic'

Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path: BAT0
  vendor: SANYO
  model: 42T4940
  serial: 13862
  power supply: yes
  updated: 2015 m. spalio 03 d. 12:40:15 (1 seconds ago)
  has history: yes
  has statistics: yes
  battery
    present: yes
    rechargeable: yes
    state: discharging
    warning-level: none
    energy: 58,82 Wh
    energy-empty: 0 W...

[Hairong (hairongxu)]

I tried by following steps wrote in the bug tracker, seems on the latest 16.04 development release doesn't has this problem.

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 15.10 (wily) reached end-of-life on July 28, 2016.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test.

[Launchpad Janitor (janitor)]

[Expired for gnome-shell (Ubuntu Wily) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for gnome-shell (Ubuntu) because there has been no activity for 60 days.]

[Paul White (paulw2u)]

Invalidating remaining task as other expired along time ago