Bug 703791

Summary: readings from upower delayed by 13 minutes
Product: [Fedora] Fedora Reporter: Tomasz Torcz <tomek>
Component: upowerAssignee: Richard Hughes <richard>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 15CC: rhughes, richard
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2012-08-07 20:02:55 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
log file from upower --monitor-detail none

Description Tomasz Torcz 2011-05-11 09:25:13 UTC 
Description of problem:
I've noticed that readings from upower are delayed by few minutes.  The noticable lag is  apparent - for example percentage is falling down even after reconnecting UPS to mains power.
I am using APC Back-UPS ES 700VA, connected via USB.

Please see attached log files (created by upower --monitor-detail).
Timeline of events:

1) UPS was fully charged
2) UPS was disconnected from mains 09:06:52.  The beeper on ups starts beeping.
3) upowerd continue to claim UPS is connected and fully charged.
4) at 09:18:52 upower started to notice that UPS is discharging. 13 minutes delay!
5) UPS continue to discharge, percentage in upower goes steadily down.
6) UPS reach critical battery charge at 09:26:56. Beeper starts sounding critically. I've reconnected mains. UPS started charging itself.
7) At this moment, upower reports UPS is at 67% full with 14.2 minutes of runtime left.
8) UPS keeps charging, upower keeps reporting decreasing percentage.
9) at 09:28:22 upower notices UPS is charging, updates time to empty and percentage.
10) while UPS is charging, upower still reports _decresing_ percentage.
11) at around 09:35 upower begin to increase percentage.

This is second time I do this test. Previously after _reconnecting_ UPS mains, upower kept reporting decreasing percentage for about 15 minutes before noticing UPS is charging.

Version-Release number of selected component (if applicable):
upower-0.9.10-1.fc15.i686

How reproducible:
Always.

Steps to Reproduce:
1. Disconnect mains from UPS
2. Observe upower --monitor-detail
3. Wait few minutes before UPS state is updated
  
Actual results:
information provided by upower is delayed by about 13 minutes.

Expected results:
Reported UPS state information should be up-to-date.
Comment 1 Tomasz Torcz 2011-05-11 09:44:17 UTC 
Created attachment 498240 [details]
log file from upower --monitor-detail

Sorry, forgot attachment.
Comment 2 Richard Hughes 2011-09-05 13:10:05 UTC 
Hmm, I've never heard of anything like this before. Could you try resetting the UPS hardware (i.e. unplugging it, turning it off, leaving it a few minutes, turning it back on, and plugging it in) and see if you can reproduce? If this doesn't work, then can you please get me the daemon log of upower --verbose and reproduce the delay. Thanks.
Comment 3 Fedora End Of Life 2012-08-07 20:02:57 UTC 
This message is a notice that Fedora 15 is now at end of life. Fedora
has stopped maintaining and issuing updates for Fedora 15. It is
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