#722498 upower: intermittently reporting battery charge as 0% even when full

Package:
upower
Source:
upower
Description:
abstraction for power management
Submitter:
Julian Gilbey
Date:
2013-09-11 22:30:11 UTC
Severity:
normal
#722498#5
Date:
2013-09-11 18:09:36 UTC
From:
To:
This is somewhat bizarre.  I don't know where xfce4-power-manager gets
its information from, but for the last couple of days I've noticed
that it is sometimes reporting things like "Adapter is online Your
battery is charging (0%)", even if I've only momentarily removed the
AC power supply.  But acpi says:

polya:~ $ acpi -i -b
Battery 0: Charging, 100%,  until charged
Battery 0: design capacity 6600 mAh, last full capacity 5792 mAh = 87%

I'm uncertain why it doesn't specify a time until charged, but it
clearly says that it's 100% full, not 0%.

Othertimes, though, xfce4-power-manager says 100% or another sensible
percentage.

I have no idea what is causing this, or where the possible bug lies.

   Julian
#722498#10
Date:
2013-09-11 20:40:04 UTC
From:
To:
Next time it happens, please use upower to get information, since it's
where xfpm gets its.

Regards,
#722498#15
Date:
2013-09-11 21:24:57 UTC
From:
To:
It's happening now, and this is the output of upower:

polya:~ $ upower -d
Device: /org/freedesktop/UPower/devices/line_power_AC
  native-path:          /sys/devices/LNXSYSTM:00/device:00/ACPI0003:00/power_supply/AC
  power supply:         yes
  updated:              Wed Sep 11 19:03:03 2013 (11987 seconds ago)
  has history:          no
  has statistics:       no
  line-power
    online:             yes

Device: /org/freedesktop/UPower/devices/battery_BAT0
  native-path:          /sys/devices/LNXSYSTM:00/device:00/PNP0C0A:00/power_supply/BAT0
  vendor:               SMP
  model:                DELL HP2877
  serial:               26
  power supply:         yes
  updated:              Wed Sep 11 19:18:14 2013 (11076 seconds ago)
  has history:          yes
  has statistics:       yes
  battery
    present:             yes
    rechargeable:        yes
    state:               fully-charged
    energy:              73.26 Wh
    energy-empty:        0 Wh
    energy-full:         73.26 Wh
    energy-full-design:  73.26 Wh
    energy-rate:         1.0767 W
    voltage:             12.548 V
    percentage:          0%
    capacity:            87.7576%
    technology:          lithium-ion

Daemon:
  daemon-version:  0.9.21
  can-suspend:     yes
  can-hibernate:   yes
  on-battery:      no
  on-low-battery:  no
  lid-is-closed:   no
  lid-is-present:  yes
  is-docked:       no

So it looks like it might be upower which is "guilty" - shall I
reassign this bug report to that package?

   Julian
#722498#20
Date:
2013-09-11 22:27:33 UTC
From:
To:
reassign 722498 upower 0.9.21-3
retitle 722498 upower: intermittently reporting battery charge as 0% even when full
thanks

[Hi upower maintainer!  Please see the (short) history of this bug
report for more context.]

Actually, it turns out that upower was updated on my system yesterday
from version 0.9.21-2 to -3, so it looks like that's the source of the
problem.  Reassigning.

   Julian