Dell M4300 laptop (and also Samsung Q35 laptop) both show a upower battery output of zero percent when the battery is fully charged, when booted to archlinux fully up to date, with the ac power cord connected. Yet acpi -b output confirms the battery is fully charged, and the kernel appears also to be correctly reporting the battery state. Versions are upower 0.9.23-1 (but the same problem occurred with version 0.9.22) Battery status from the various sources of data are: [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/charge_now 5200000 [mike@lapmike3 ~]$ acpi -b Battery 0: Full, 100% [mike@lapmike3 ~]$ upower -d Device: /org/freedesktop/UPower/devices/line_power_AC native-path: AC power supply: yes updated: Mon 28 Oct 2013 10:46:54 GMT (782 seconds ago) has history: no has statistics: no line-power online: yes Device: /org/freedesktop/UPower/devices/battery_BAT0 native-path: BAT0 vendor: SMP model: DELL XD7368 serial: 3261 power supply: yes updated: Mon 28 Oct 2013 10:46:59 GMT (777 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: fully-charged energy: 57.72 Wh energy-empty: 0 Wh energy-full: 57.72 Wh energy-full-design: 57.72 Wh energy-rate: 6.0051 W voltage: 12.004 V percentage: 0% capacity: 92.4615% technology: lithium-ion Daemon: daemon-version: 0.9.23 on-battery: no on-low-battery: no lid-is-closed: no lid-is-present: yes is-docked: no It is noticed that the "percentage 0%" is not consistent with "state fully-charged" in the upower output. The symptoms look similar to the report at https://bugs.freedesktop.org/show_bug.cgi?id=49846 which was never resolved. Also I had previously reported this to the KDE bug reports at https://bugs.kde.org/show_bug.cgi?id=326332
What does: $ cat /sys/class/power_supply/BAT0/capacity say?
Here is the output of the requested command plus the parameters in the same directory: [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/capacity 108 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/charge_now 5200000 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/charge_full 4808000 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/charge_full_design 5200000 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/current_now 1000 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/cycle_count 0 I also see that there is a new version of upower in the repos - so I will update the system and test again shortly.
Was fixed by that commit. Will be in the next version of UPower 0.9, and 0.99. commit b8fe9902f3c6c50ca6a23e24fcea99582beebc65 Author: Martin Pitt <martinpitt@gnome.org> Date: Tue Oct 22 10:02:51 2013 +0200 linux: Clamp percentage for overfull batteries Some batteries report energy > energy_full and a percentage ("capacity" attribute) > 100%. Clamp these within 0 and 100% for both plausibility as well as to avoid setting an out-of-range property which would then become 0%. https://launchpad.net/bugs/1240673
Many thanks - this is confirmed fixed as of archlinux upower version: upower 0.9.23-2 With this latest version the command outputs from the previous commands are: [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/capacity 108 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/charge_now 5200000 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/charge_full 4808000 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/charge_full_design 5200000 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/current_now 1000 [mike@lapmike3 ~]$ cat /sys/class/power_supply/BAT0/cycle_count 0 [mike@lapmike3 ~]$ acpi -b Battery 0: Full, 100% [mike@lapmike3 ~]$ upower -d Device: /org/freedesktop/UPower/devices/line_power_AC native-path: AC power supply: yes updated: Mon 28 Oct 2013 18:19:07 GMT (113 seconds ago) has history: no has statistics: no line-power online: yes Device: /org/freedesktop/UPower/devices/battery_BAT0 native-path: BAT0 vendor: SMP model: DELL XD7368 serial: 3261 power supply: yes updated: Mon 28 Oct 2013 18:19:12 GMT (108 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: fully-charged energy: 57.72 Wh energy-empty: 0 Wh energy-full: 57.72 Wh energy-full-design: 57.72 Wh energy-rate: 0.0111 W voltage: 12.919 V percentage: 100% capacity: 92.4615% technology: lithium-ion History (charge): 1382984348 100.000 fully-charged 1382984347 0.000 unknown History (rate): 1382984348 0.011 fully-charged 1382984347 0.000 unknown Daemon: daemon-version: 0.9.23 on-battery: no on-low-battery: no lid-is-closed: no lid-is-present: yes is-docked: no Many thanks for the fast resolution.
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