Public bug reported:
I can reproduce it after a couple of tries on my Dell Rugged 5430
equipped with 2 batteries. My assumption is that may happen on any
hardware with 2+ batteries with plucky and upower 1.90.7-1build1.
Sometimes after resuming from suspend upower reports more than 100%
percentage on the DisplayDevice composite battery:
upower -d /org/freedesktop/UPower/devices/DisplayDevice
Device: /org/freedesktop/UPower/devices/DisplayDevice
power supply: yes
updated: śro, 23 lip 2025, 13:43:08 (28 seconds ago)
has history: no
has statistics: no
battery
present: yes
state: discharging
warning-level: none
energy: 66,633 Wh
energy-full: 36,2634 Wh
energy-rate: 4,3434 W
charge-cycles: N/A
time to empty: 15,3 hours
percentage: 183,747%
icon-name: 'battery-full-symbolic'
After I added some debugging code in src/up-daemon.c (ppa:dgadomski/test
upower) I figured that energy_full_total is set only to the energy_full
of the first battery, while energy_total has the sum of both batteries:
journal -b 0 -u upower.service
(...)
lip 23 13:39:37 zack upowerd[3578]: TI:13:39:37 battery 0, energy:
36,263400, energy_full: 36,263400, energy_rate: 0,011400, time_to_empty: 11>
lip 23 13:39:37 zack upowerd[3578]: TI:13:39:37 battery 1, energy:
30,688800, energy_full: 0,000000, energy_rate: 4,879200, time_to_empty: 226>
lip 23 13:39:37 zack upowerd[3578]: TI:13:39:37 Calculating percentage
and time to full/to empty for 2 batteries
lip 23 13:39:37 zack upowerd[3578]: TI:13:39:37 energy_total: 66,952200
energy_full_total: 36,263400
This leads the total percentage to exceed 100% which should never be the
case as I understood from the code.
This results also in broken UI in gnome-control-center expecting the
percentage to go as high as 100% (screenshot attached).
The actual cause to this is why the battery 1 reports energy_full as 0.
Test plan:
1. Suspend the machine
2. Resume from suspend.
3. Go to 1 if battery percentage is <=100%.
** Affects: upower (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2117707
Title:
More than 100% battery reported with 2+ batteries
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