upower shows wrong battery percentage after waking up from suspend

[Philip Muškovac]

Binary package hint: upower

upower currently shows a remaining percentage of 8.13402% while it is in fact 81% as shown by ACPI.

$ upower --dump
Device: /org/freedesktop/UPower/devices/line_power_AC
  native-path: /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:0a/PNP0C09:00/ACPI0003:00/power_supply/AC
  power supply: yes
  updated: Tue Apr 26 10:41:47 2011 (1637 seconds ago)
  has history: no
  has statistics: no
  line-power
    online: no

Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path: /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:0a/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
  vendor: Panasonic
  model: 42T4801
  serial: 9429
  power supply: yes
  updated: Tue Apr 26 11:08:52 2011 (12 seconds ago)
  has history: yes
  has statistics: yes
  battery
    present: yes
    rechargeable: yes
    state: discharging
    energy: 6.761 Wh
    energy-empty: 0 Wh
    energy-full: 83.12 Wh
    energy-full-design: 84.24 Wh
    energy-rate: 3.051 W
    voltage: 11.47 V
    time to empty: 2.2 hours
    percentage: 8.13402%
    capacity: 98.6705%
    technology: lithium-ion
  History (charge):
    1303808932 8.134 discharging
    1303808902 8.173 discharging
    1303808872 8.205 discharging
    1303808842 8.234 discharging
  History (rate):
    1303808932 3.051 discharging
    1303808902 2.735 discharging
    1303808872 2.583 discharging
    1303808842 2.389 discharging

Daemon:
  daemon-version: 0.9.9
  can-suspend: yes
  can-hibernate no
  on-battery: yes
  on-low-battery: yes
  lid-is-closed: no
  lid-is-present: yes
  is-docked: no

$ acpi -V
Battery 0: Discharging, 81%, 02:11:51 remaining
Battery 0: design capacity 735 mAh, last full capacity 725 mAh = 98%
Adapter 0: off-line

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: upower 0.9.9-4
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue Apr 26 11:08:12 2011
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110124)
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
 LANGUAGE=en_US.UTF-8
SourcePackage: upower
UpgradeStatus: No upgrade log present (probably fresh install)

[Rafael P. (rafael-p)]

Can be fixed by killing upowerd ( /usr/lib/upower/upowerd). A script can be written in /etc/pm/sleep.d/ to do this at each resume from sleep.
An upstream fix is strongly desired though.

[Hartmut Voge (hartmut-voge)]

Similar effect on my machine:

The ThinkPad x61s is running ubuntu 11.04. The upowerd (0.9.9-4) shows sometimes a wrong energy-full value after wake up from standby:

upower --monitor-detail
Monitoring activity from the power daemon. Press Ctrl+C to cancel.
[14:46:10.037] device changed: /org/freedesktop/UPower/devices/battery_BAT0
  native-path: /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
  vendor: SANYO
  model: 92P1003
  serial: 804
  power supply: yes
  updated: Sun Jun 12 14:46:09 2011 (1 seconds ago)
  has history: yes
  has statistics: yes
  battery
    present: yes
    rechargeable: yes
    state: discharging
    energy: 10.16 Wh
    energy-empty: 0 Wh
    energy-full: 166.08 Wh
    energy-full-design: 63.36 Wh
    energy-rate: 11.691 W
    voltage: 13.82 V
    time to empty: 52.1 minutes
    percentage: 6.11753%
    capacity: 98.6742%
    technology: lithium-ion
  History (charge):
    1307882769 6.118 discharging
    1307882739 6.190 discharging
    1307882709 6.274 discharging
    1307882679 6.334 discharging
  History (rate):
    1307882769 11.691 discharging
    1307882740 13.400 discharging
    1307882710 12.879 discharging
    1307882679 13.064 discharging

Workaround: As mentioned already, restart the upowerd after wake up seems to help.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Hiroshi Miura (miurahr)]

seems duplicated with #626025
fix is in kernel acpi subsystem; http://www.spinics.net/lists/stable-commits/msg11704.html
that is in #775809

[Benjamin Daines (benjamindaines)]

Same problem here in 12.10