Bug 287338 - Laptop Brightness control doesn't work
Summary: Laptop Brightness control doesn't work
Status: RESOLVED UNMAINTAINED
Alias: None
Product: solid
Classification: Unmaintained
Component: powermanagement (other bugs)
Version First Reported In: unspecified
Platform: Ubuntu Linux
: NOR normal
Target Milestone: ---
Assignee: Dario Freddi
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-11-23 06:59 UTC by Santosh K
Modified: 2018-09-04 15:45 UTC (History)
3 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Santosh K 2011-11-23 06:59:07 UTC 
Version:           unspecified (using KDE 4.7.2) 
OS:                Linux

Laptop brightness is not changing automatically when power profile changes. By default it is at its maximum brightness.
It did not change when I tried manually. I can see a brightness meter on the screen but the actual brightness is not effected.
I'm using Kubuntu 11.10 on Sony VAIO VPCEG2AEN (Intel HD Graphics 3000)

Reproducible: Always

Steps to Reproduce:
All the time, when ever I try to change the brightness of my laptop screen, it doesn't change. 

Actual Results:  
Brightness doens't change.

Expected Results:  
Brightness has to change.

It should decrease the brightness and increase accordingly.
Comment 1 Pablo 2013-02-12 16:14:16 UTC 
I have same trouble, with ati radeon hd 7600 series. The free driver doesn't work fine.
Comment 2 Alex Fiestas 2013-03-12 12:53:23 UTC 
Are you still able to reproduce this with 4.9.5 or 4.10? a lot has changed in this regard since 4.7

Thanks !
Comment 3 Santosh K 2013-03-12 14:08:06 UTC 
Yes, I still have the same problem (Intel HD 3000). I am currently using Kubuntu 12.10 which had KDE 4.9.5.

I could find a temporary fix for this..

I write values (0-4822) in the file "/sys/class/backlight/intel_backlight/brightness" to change the brightness.
Comment 4 Alex Fiestas 2013-07-28 21:58:50 UTC 
Sorry for the delayed response, apparently I did not get your reply on my inbox.

Can you try with 4.11? we changed a bunch of stuff for this version, I really hope it will fix it for you :/

You can use the Neon project, it will install KDE 4.11/2 in a way that does not break your 4.9.5

Thanks !
Comment 5 Alex Fiestas 2014-01-20 02:07:29 UTC 
Closing for inactivity.

Please, if you can still reproduce this bug feel free to re-open it.

Thanks !
Comment 6 Santosh K 2014-01-23 05:26:14 UTC 
I have installed Kubuntu 14.04 alpha 1 (KDE 4.12.1). 
The problem still persists. The laptop brightness doesn't change using the keyboard shortcut (example: Fn + F5/F6), although I can see brightness meter changing on the screen.

I have noticed few changes in this version of KDE. 
"Enabling/Disabling Touchpad function (on laptop)" through keyboard shortcut is functioning now, which was not in earlier versions.
Comment 7 Christoph Feck 2014-02-08 20:35:40 UTC 
Thanks for the update.
Comment 8 Jonathan Riddell 2015-03-11 19:18:54 UTC 
This bug is reported on libsolid which is the kdelibs4 version of the solid library.  It is now in maintenance mode.  If you think it should still be fixed in the KDE Frameworks 5 version of solid please move it to or report a bug on frameworks-solid or Powerdevil.
Comment 9 Andrew Crouthamel 2018-09-04 15:45:01 UTC 
Hello! Sorry to be the bearer of bad news, but this project has been unmaintained for many years so I am closing this bug. Please try again with the latest version and submit a new bug to frameworks-solid if your issue persists. Thank you!