Bug 302007

Summary: Can not save backlight brightness
Product: [Unmaintained] solid Reporter: Jaime Torres <jtamate>
Component: powermanagementAssignee: Dario Freddi <drf>
Status: RESOLVED WORKSFORME    
Severity: normal CC: afiestas
Priority: NOR    
Version First Reported In: 4.9-git   
Target Milestone: ---   
Platform: Compiled Sources   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Jaime Torres 2012-06-16 11:30:50 UTC 
Every time the monitor is turned on after the screen timeout happens I get an authentication dialog.



Reproducible: Always

Steps to Reproduce:
1. let the display timeout and let kded4 powerdevil/solid power down the monitor.
2.After that, I press any key, and the dialog is there.

Actual Results:  
Every time the monitor is turned on after the screen timeout happens I get an authentication dialog.


Expected Results:  
as I have the policies
Get brighness "org.kde.powerdevil.backlighthelper.brightness" and
Set birghtness  "org.kde.powerdevil.backlighthelper.setbrightness"
set to YES, I expect no dialog at all.


I get the following log:

No outputs have backlight property
kded(24813) PowerDevilUPowerBackend::brightness: org.kde.powerdevil.backlighthelper.brightness failed 
Object::connect: No such signal QDBusAbstractInterface::Changed() in kdelibs/solid/solid/backends/upower/upowerdevice.cpp:47
Comment 1 Jaime Torres 2012-08-02 18:19:32 UTC 
another easier way is just to kquitapp plasma-desktop. when restarted, the message is here again.
Comment 2 Jaime Torres 2012-10-09 07:50:44 UTC 
It is invalid. I had a PAM misconfiguration (trying to load a 32bit pam module)
Comment 3 Jaime Torres 2012-10-12 09:01:34 UTC 
It is still valid, after a total recompilation of KDE SC, and the fix for the PAM misconfiguration, it is here again.
Comment 4 Alex Fiestas 2013-03-24 03:58:10 UTC 
Authentication you mean KAuth right?

This is most probably happening because you are missing the file that authorize the "brightnesshelper" to be executed as root from your user.

Check if this file exists:
/etc/dbus-1/system.d/org.kde.powerdevil.backlighthelper.conf
Comment 5 Jaime Torres 2013-03-24 08:34:04 UTC 
Yes, KAuth.

I have now the file you mention and the problem is gone.
> cat /etc/dbus-1/system.d/org.kde.powerdevil.backlighthelper.conf
<!DOCTYPE busconfig PUBLIC
 "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
 
  <!-- Only user root can own the foo helper -->
  <policy user="root">
    <allow own="org.kde.powerdevil.backlighthelper"/>
  </policy>
 
</busconfig>