Bug 347712

Summary:	Backlight settings based on local time
Product:	[Plasma] Powerdevil	Reporter:	Roman Šmakal <schmakerisko>
Component:	general	Assignee:	Plasma Development Mailing List <plasma-devel>
Status:	REPORTED ---
Severity:	wishlist	CC:	kdelibs-bugs, lukas, mklapetek, schmaker
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
URL:	https://bugs.kde.org/show_bug.cgi?id=179093
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Roman Šmakal 2015-05-14 12:18:13 UTC

Hello there,
it will be fine to get some advanced setting of backlightin systemsettings. My idea is to set time, when backlight will be set to lower level, because high backlight level causes eye hurts after some time in dark. But that you realize after eyes started to hurt, so manual backlight settings isnt enough.
I think it is good for your health and powersaving as well. There was also nightmode effect for KDE4 laying around kde-apps (http://kde-apps.org/content/show.php?content=123805) that made display to be more gray-ish for even better eye saving - could be nice add on to it.
So what are you thinking about it? Shouldnt be that hard to implement (settings module could also be able to download sunrise - sun fall down times to make things even more automated). Would love to see this feature in my favorite enviroment :)

Thanks for your time
Roman

Reproducible: Always

Comment 1 Roman Šmakal 2015-05-14 12:19:21 UTC

I moved it to this section as Jonathan Riddell told me so at previous #179093 bug. Have new e-mail so i had to make new bug-report. You can make previous invalid now. Thanks

Comment 2 Martin Klapetek 2015-05-14 12:32:12 UTC

*** Bug 179093 has been marked as a duplicate of this bug. ***

Comment 3 Martin Klapetek 2015-05-14 12:34:38 UTC

What would be nice is if the backlight actually reacted on the light sensor some laptops have. This would then give backlight based on time for free as the ambient light goes down with the sun going down.

Although on a second thought the time-based thingy would still have to be there as a fallback as not all laptops have ambient light sensor.

Comment 4 Roman Šmakal 2015-05-14 12:37:22 UTC

One more thing i forgot to add - most of desktop monitors do not have ability to set up backlight level (without touching monitor settings of course :)), so KDE night mode presented on KDE-Apps could be used as "fallback" there. No more red eyes in the morning for all programmers in the world. :)

Comment 5 Roman Šmakal 2015-05-14 12:38:31 UTC

Laptops also have webcams, which could be used as ambient light sensor too. Just an idea

Comment 6 Martin Klapetek 2015-05-14 12:40:10 UTC

> Laptops also have webcams, which could be used as ambient light sensor too. Just an idea

I know there was a patch at some point exactly for this but was rejected.

Fwiw, there's also the redshift project, which shifts colors of your screen towards the red as the daytime changes, there is also an applet for plasma4, but it can work just fine even without an applet (I've been using it for some time).

http://jonls.dk/redshift/

Comment 7 Roman Šmakal 2015-05-14 12:42:00 UTC

Already tried that some day ago, but it was not enough for me. I mostly used manual backlight settings with KDE night mode app, that was only way to get rid of eye pain. Any chance these stuff could be implemented in KDE?

Comment 8 Martin Klapetek 2015-05-14 12:52:09 UTC

Ah so it wasn't a patch, but a project proposal for the webcam --> http://marc.info/?l=kde-core-devel&m=133352645130676&w=2

Comment 9 Roman Šmakal 2015-05-14 12:55:39 UTC

This is example app working with webcam data, but laptops have way too big backlight steps, so its not quite good for regular usage.

http://www.webupd8.org/2012/06/calise-sets-screen-backlight-based-on.html