Bug 457900

Summary: 2 minute delay in updating AC status in system tray
Product: [Plasma] plasmashell Reporter: arno <peddy22>
Component: Power management & brightnessAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: nate
Priority: NOR    
Version First Reported In: 6.2.4   
Target Milestone: 1.0   
Platform: Kubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description arno 2022-08-15 06:40:15 UTC 
SUMMARY
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STEPS TO REPRODUCE
1.  own a thinkpad x230
2.  unplug the power supply
3.  keep an eye on the default system tray's battery icon

OBSERVED RESULT
the AC connected icon remains on for about 2 minutes, then it updates and plays the chime

EXPECTED RESULT
the AC disconnected chime should play immediately and update the icon as soon as AC is disconnected

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
5.25.4
KDE Plasma Version: 
5.25.4
KDE Frameworks Version: 
5.9
Qt Version: 


ADDITIONAL INFORMATION
this happens in both kubuntu 21.04 and 21.10

"acpi -V" shows the change immediately, as does "upower -m" which leads me to believe it is a KDE bug
Comment 1 Nate Graham 2022-08-15 17:39:43 UTC 
Works as expected with my ThinkPad X1 Yoga.
Comment 2 arno 2022-08-16 05:21:17 UTC 
I guess that's why I'm not running Plasma on wla C64

🙂

> On 16/08/2022, at 5:39 AM, Nate Graham <bugzilla_noreply@kde.org> wrote:
> 
> https://bugs.kde.org/show_bug.cgi?id=457900
> 
> Nate Graham <nate@kde.org> changed:
> 
>           What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                 CC|                            |nate@kde.org
> 
> --- Comment #1 from Nate Graham <nate@kde.org> ---
> Works as expected with my ThinkPad X1 Yoga.
> 
> -- 
> You are receiving this mail because:
> You reported the bug.
Comment 3 arno 2022-08-18 03:04:59 UTC 
do you have any idea which code is responsible for the battery applet? i could possibly workaround by making it read the udev result

works fine on windows pe on the same machine

over a 4-trial test it took almost exactly 2 minutes each time, with a deviation of +- 5s.
Comment 4 arno 2022-08-18 03:28:56 UTC 
(In reply to arno from comment #3)
> do you have any idea which code is responsible for the battery applet? i
> could possibly workaround by making it read the udev result
> 
> works fine on windows pe on the same machine
> 
> over a 4-trial test it took almost exactly 2 minutes each time, with a
> deviation of +- 5s.

also, I am noting this problem does not occur in the previous release and does not occur in GNOME
Comment 5 arno 2022-08-22 08:26:54 UTC 
about 1 in 10 reboots will produce the correct result
Comment 6 arno 2024-12-18 22:07:07 UTC 
Pretty sure this has been fixed