Bug 351693

Summary:	Screen brightness is not restored after screen unlock (idle time)
Product:	[Plasma] Powerdevil	Reporter:	soee <kontakt>
Component:	general	Assignee:	Plasma Development Mailing List <plasma-devel>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	alx5000, august.rydberg, fabrizio.ruggeri, gkokmdam+kde, gkokmdam, juan.baptiste, mail, nate, yg
Priority:	NOR
Version:	5.3.90
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description soee 2015-08-24 13:20:09 UTC

Working with Dell laptop often it is left with lock screen when i am afk. After some idle time screen brightness is lowered by system to save power. When i return and move cursor or unlock screen, original brightness is not restored so i have to do it manually.

Reproducible: Always

Steps to Reproduce:
1. Lock screen
2. Leave laptop unused for some time
3. Try to move cursor and unlock screen

Actual Results:  
Original brightness is not restored - screen stays darker.

Expected Results:  
System should restore original screen brightness that was set bofore it went to idle.

Comment 1 Fabrizio Ruggeri 2015-10-16 10:10:12 UTC

I have exactly the same problem on a Dell latitude E6540

If I can add some more informations let me know.

Comment 2 Fabrizio Ruggeri 2015-10-16 10:12:20 UTC

Kubuntu 15.04
Kde platform version 4.14.8
Kde plasma version 5.3.2
Qt version 5.4.1
Kernel: 3.19.0-30-generic (64bit)

Comment 3 Juan Luis Baptiste 2016-02-23 15:58:03 UTC

I can also confirm this on kubuntu 15.10, both with default plasma 5.3 install and with plasma 5.5 from backports ppa.

Comment 4 August Rydberg 2016-07-10 10:48:44 UTC

I can confirm this on Kubuntu 16.04 with plasma 5.5.5.

Comment 5 August Rydberg 2016-07-10 10:50:33 UTC

Some more info:
Lenovo Yoga 2 Pro @ 1920x1080
Kernel: 4.4.0-24-generic

Comment 6 Yves Glodt 2017-08-18 22:53:17 UTC

I have a kind of the same issue. I use a two monitor-setup (laptop-screen and an external monitor connected by hdmi)

When udimming after the screens are dimmed after 5 min. of inactivity, the laptop screen comes back with full brightness.

I then have to click on the battery icon in the tray, and the indicator still shows the minimum brightness (which is my choice).

As soon as I move the indicator (slider) a bit, it lowers the brightness to the set level.

First bug: The brightness should not change after the screen dims.
Second bug: After dim happens, the indicator shows minimum brightness even it's set to full. As soon as I move it it goes back to the value actually set by the indicator.

Comment 7 Nate Graham 2017-10-27 13:15:01 UTC

*** This bug has been marked as a duplicate of bug 352497 ***