Bug 49846 - upower reports "percentage: 0%" while laptop is AC-adapter-powered and battery is 100% charged
Summary: upower reports "percentage: 0%" while laptop is AC-adapter-powered and batter...
Status: RESOLVED NOTOURBUG
Alias: None
Product: upower
Classification: Unclassified
Component: general (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Richard Hughes
QA Contact:
URL: https://bugs.launchpad.net/bugs/981212
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-05-12 10:06 UTC by Bob Bib
Modified: 2013-10-28 18:54 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
upower --monitor-detail (1.70 KB, text/plain)
2012-05-12 10:06 UTC, Bob Bib 		Details
/sys/class/power_supply/BAT0/uevent (433 bytes, application/octet-stream)
2012-05-12 10:10 UTC, Bob Bib 		Details
/sys/class/power_supply/BAT0/uevent (433 bytes, text/plain)
2012-05-12 10:12 UTC, Bob Bib 		Details
/proc/acpi/battery/BAT0/info (437 bytes, text/plain)
2012-05-12 10:13 UTC, Bob Bib 		Details
/proc/acpi/battery/BAT0/state (194 bytes, text/plain)
2012-05-12 10:15 UTC, Bob Bib 		Details
Show Obsolete (1) View All

Description Bob Bib 2012-05-12 10:06:39 UTC 
Created attachment 61510 [details]
upower --monitor-detail

upower strangely reports "percentage: 0%" while laptop is AC-adapter-powered and battery is 100% charged

Ubuntu 12.04 LTS / amd64
Linux kernel version: Ubuntu 3.2.0-24.37-generic 3.2.14
upower 0.9.15-3git1
Comment 1 Bob Bib 2012-05-12 10:10:02 UTC 
Created attachment 61511 [details]
/sys/class/power_supply/BAT0/uevent
Comment 2 Bob Bib 2012-05-12 10:12:10 UTC 
Created attachment 61512 [details]
/sys/class/power_supply/BAT0/uevent
Comment 3 Bob Bib 2012-05-12 10:13:16 UTC 
Created attachment 61513 [details]
/proc/acpi/battery/BAT0/info
Comment 4 Bob Bib 2012-05-12 10:15:21 UTC 
Created attachment 61514 [details]
/proc/acpi/battery/BAT0/state
Comment 5 Bob Bib 2012-05-12 10:19:22 UTC 
All attached files were taken with 100% charged battery and AC power supply connected.
Comment 6 Bastien Nocera 2013-10-12 22:46:02 UTC 
>    energy:              0 Wh

What's the output of:
cat /sys/class/power_supply/BAT0/energy_now
?
Comment 7 Bob Bib 2013-10-13 01:37:56 UTC 
Bastien Nocera:
> What's the output of:
> cat /sys/class/power_supply/BAT0/energy_now
> ?

Unfortunately, nothing meaningful:
$ cat /sys/class/power_supply/BAT0/energy_now
cat: /sys/class/power_supply/BAT0/energy_now: No such file or directory

It's the same laptop, but now slightly different distro:
Debian testing "jessie" / amd64
Linux 3.10.7 (3.10.7-1)
upower 0.9.21 (0.9.21-2)
Comment 8 Bastien Nocera 2013-10-13 07:04:45 UTC 
The ACPI for that laptop seems pretty broken:
POWER_SUPPLY_CHARGE_NOW=-1000

You should report this as a bug against the kernel at bugzilla.kernel.org. The laptop lacks energy_* information.

Reopen this bug if the kernel developers think that this is actually a bug in UPower.
Comment 9 Mike C 2013-10-28 18:54:05 UTC 
It turns out that this was indeed a bug in upower and is resolved in arch linux package upower version 0.9.23-2

The upstream report for this is at https://bugs.freedesktop.org/show_bug.cgi?id=70952

So this I believe is now fully resolved with the latest upower version.

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