Bug 309106

Summary:	Brightness control doesn't work, it does nothing.
Product:	[Unmaintained] solid	Reporter:	dmnmsc <jpujob>
Component:	powermanagement	Assignee:	Dario Freddi <drf>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	afiestas, cfeck, davies.adam51, kde, plasma-bugs, s5saso
Priority:	NOR
Version:	4.9.2
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description dmnmsc 2012-10-27 15:59:03 UTC

I have problems using the brightness control on my Acer Aspire TimelineX 1830T (w/ Kubuntu 12.10) -

It seems to work for the system (the brightness bar goes up and down If I try to change the brightness with battery brightness indactor) but nothing happens.

And If I try it with control keys, brightness try to change, but do it slowly freezing my system.

Can you help me, please? Thanks.

Reproducible: Always

Steps to Reproduce:
1.Open Battery-indicator.
2. Move Brightness bar
3. Nothing changes.


Expected Results:  
Brightness bar control works

Comment 1 Adam Davies 2012-12-08 20:54:44 UTC

I'm running 4.10 beta and the brightness control works for me.

Comment 2 dmnmsc 2012-12-08 21:20:34 UTC

I'm using KDE 4.9.4 and seems to be "solved". Not works perfect... but works.

By the way, I've updated my Intel Drivers from ppa:ubuntu-x-swat/intel-graphics-updates

And changed this line on my grub config:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

for this line:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

After saving changes I run:
sudo update-grub

Now, Battery-indicator works fine. And if I try to change brightness with key controls works so good. No system freeze. It's not perfect, but good. Enough for me.


(In reply to comment #1)
> I'm running 4.10 beta and the brightness control works for me.

Comment 3 sAso 2013-01-31 22:12:37 UTC

I'm using KDE 4.9.5  and brightness control still does NOTHING..works fine on Ubuntu 12.04 on same system though.

Comment 4 Jekyll Wu 2013-02-01 04:34:25 UTC

*** Bug 314215 has been marked as a duplicate of this bug. ***

Comment 5 David Edmundson 2013-02-04 16:31:02 UTC

Open a konsole and run this:

qdbus org.kde.Solid.PowerManagement /org/kde/Solid/PowerManagement org.kde.Solid.PowerManagement.setBrightness 20


qdbus org.kde.Solid.PowerManagement /org/kde/Solid/PowerManagement org.kde.Solid.PowerManagement.setBrightness 80

this will use the KDE power management backend to set the brightness to 20% and 80% respectively. If that doesn't work, it's not the applet at fault.

Comment 6 sAso 2013-02-04 16:42:34 UTC

(In reply to comment #5)
> Open a konsole and run this:
> 
> qdbus org.kde.Solid.PowerManagement /org/kde/Solid/PowerManagement
> org.kde.Solid.PowerManagement.setBrightness 20
> 
> 
> qdbus org.kde.Solid.PowerManagement /org/kde/Solid/PowerManagement
> org.kde.Solid.PowerManagement.setBrightness 80
> 
I did and it shows nicely on slider but the actual brightness doesn't change..
> this will use the KDE power management backend to set the brightness to 20%
> and 80% respectively. If that doesn't work, it's not the applet at fault.

Comment 7 Christoph Feck 2013-02-11 17:41:55 UTC

Reassigning to Solid developers for inspection.

Comment 8 Alex Fiestas 2013-03-03 17:42:35 UTC

Let's talk about this in the same thread.

*** This bug has been marked as a duplicate of bug 308757 ***