Bug 656738

Summary:	Battery charge indicator says 6.2% when disconnected from AC
Product:	[Fedora] Fedora	Reporter:	Bernie Innocenti <bernie+fedora>
Component:	kernel	Assignee:	John Feeney <jfeeney>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	low
Version:	14	CC:	gansalmon, itamar, jfeeney, jonathan, kernel-maint, madhu.chinakonda, olivier.crete, richard, zman0900
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	kernel-2.6.35.10-74.fc14	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-12-26 19:54:34 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Bernie Innocenti 2010-11-24 00:52:48 UTC

Description of problem:
Very often, after I disconnect the AC from my Lenovo X201, the battery icon in the panel becomes immediately red and says 6.2% charge left. The remaining time, however is correct (2h40 left).

The value slowly goes down as the battery discharges. So there seems to be an incorrect multiplication factor applied to the number.


The command line tool acpi reports the correct percentage:

 bernie@giskard:~$ acpi
 Battery 0: Discharging, 59%, 02:46:56 remaining


Version-Release number of selected component (if applicable):
gnome-power-manager-2.32.0-3.fc14.x86_64

How reproducible:
very often (always? not sure)

Steps to Reproduce:
1.disconnect charger
2.look at battery icon

Actual results:
5.7%

Expected results:
56%

Comment 1 seth vidal 2010-12-22 16:13:46 UTC

Same behavior here. My battery estimate is always off by a decimal place.
it'll say 9.3% in the applet but the real battery life is 93%

The time is right - but the battery icon is wrong and the percentage is wrong.

Comment 2 Matthew Garrett 2010-12-23 16:00:07 UTC

Can you test the kernel from http://koji.fedoraproject.org/koji/taskinfo?taskID=2686910 when it's built?

Comment 3 Fedora Update System 2010-12-23 20:47:46 UTC

kernel-2.6.35.10-74.fc14 has been submitted as an update for Fedora 14.
https://admin.fedoraproject.org/updates/kernel-2.6.35.10-74.fc14

Comment 4 Fedora Update System 2010-12-25 00:26:00 UTC

kernel-2.6.35.10-74.fc14 has been pushed to the Fedora 14 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update kernel'.  You can provide feedback for this update here: https://admin.fedoraproject.org/updates/kernel-2.6.35.10-74.fc14

Comment 5 Fedora Update System 2010-12-26 19:54:17 UTC

kernel-2.6.35.10-74.fc14 has been pushed to the Fedora 14 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Olivier Crête 2010-12-27 16:17:31 UTC

*** Bug 608341 has been marked as a duplicate of this bug. ***

Comment 7 Dan Ziemba 2011-11-18 22:20:58 UTC

I've still got this problem with Fedora 16 x64 (EFI boot) on a macbook pro 8,1. Sometimes the "energy when full" value in upower becomes much too large causing the battery to report a low percent.  Time is still reasonable.  Killing upowerd seems to fix the problem.

Comment 8 Dan Ziemba 2011-11-18 22:22:39 UTC

Sorry for the double post.  Can this bug be reopened?  Also I think the effected component should be upower not the kernel.

Comment 9 Matthew Garrett 2011-11-18 22:29:25 UTC

Dan,

Please open a separate bug. You have similar symptoms, but if it was the same problem it'd already be fixed.