Bug 426281

Summary:	Show apps inhibiting power management in the KCM, just like in the applet
Product:	[Applications] systemsettings	Reporter:	Lassi Väätämöinen <lassi.vaatamoinen>
Component:	kcm_powerdevil	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	CONFIRMED ---
Severity:	wishlist	CC:	kde, natalie_clarius, nate, nicolas.fella, popov895
Priority:	NOR
Version First Reported In:	5.19.5
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Lassi Väätämöinen 2020-09-07 14:38:02 UTC

SUMMARY
If an application prevents energy saving functionality, there is no way for an average user to tell which application it is.

Using KDE Connect as an example.

STEPS TO REPRODUCE
1. Pair/Connect a mobile device with KDE Connect 
2. Go to System Settings -> Power Management -> Energy Saving
3. Set "Screen Energy Saving" to switch off after 1 minute

OBSERVED RESULT
Wait for over a minute, display not switched off.

EXPECTED RESULT
Display would be switched off, as there is no indication to the user that this would not happen.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
Operating System: openSUSE Tumbleweed 20200905
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.73.0
Qt Version: 5.15.0
Kernel Version: 5.8.4-1-default
OS Type: 64-bit
Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
Memory: 15,6 GiB of RAM
Graphics Processor: Radeon RX 580 Series

ADDITIONAL INFORMATION
Eventually the application "inhibiting DPMS" was discovered via 'journalctl -e'. 

Then needed to go to Tray -> KDE Connect Settings and disable "Inhibit screensaver" -plugin.

It would be useful to show in the system settings a list of applications that are inhibiting Energy saving functionalities. Initially as a simple list in a separate dialog, for example.

In a more elaborate version, there could be a function to launch the given application settings, directly from Energy Saving settings.

Possibly related to issue https://bugs.kde.org/show_bug.cgi?id=357288

Comment 1 Nicolas Fella 2020-09-07 22:57:03 UTC

The battery Plasmoid shows this informatiom

Comment 2 Nate Graham 2020-09-08 20:50:39 UTC

The Battery & Brightness system tray applet shows this already. When you open it and any applications are inhibiting power management, they will be listed in the header area.

Comment 3 Lassi Väätämöinen 2020-09-08 20:56:47 UTC

Running a desktop PC that does not have battery and uses a monitor whose brightness is not adjustable via software dimisses the use of battery applet.

Also, the bug reported here is about System Aettings, which does not display the inhibiting applications.

So, IMO setting it WORKSFORME and pointing to another application does not really justify the resolution.

Comment 4 Nate Graham 2020-09-08 21:07:21 UTC

Fair enough.

Comment 5 popov895 2020-10-20 07:10:58 UTC

Try Power Management Inhibition extension (https://store.kde.org/p/1426768). It shows the same information, but separate from the battery applet.