What is "DimDisplay" and why is KDE demanding it?

[Nikos Chantziaras]

On 29/07/13 19:07, Duncan wrote:
> Nikos Chantziaras posted on Mon, 29 Jul 2013 14:41:46 +0300 as excerpted:
>
>> In KDE 4.11 (since the first beta, currently on 4.10.97), every time I
>> login I get an error message:
>>
>>     The profile AC tried to activate DimDisplay, a non existent action.
>>     This is usually due to an installation problem or to a configuration
>>     problem.
>>
>> I get this message every time, in a weird box at the top of the screen:
>>
>>     http://13o.imghost.us/NM/power_bug.png
>>
>> Any hints on how to stop that from happening?
>
> Have you tried setting up a fresh user (or temporarily moving all of your
> normal user config, including ~/.kde and ~/.config, elsewhere) and seeing
> if the problem exists there?  That would allow you to tell whether it's
> in the existing user config or not.
>
> An educated guess is that the message is from powerdevil, the kde laptop
> power management app.  I don't have it installed here, but at least solid
> (part of the kde hardware management system) apparently had some major
> changes for 4.11, and it wouldn't surprise me at all if the existing
> powerdevil power profiles no longer functioned, triggering a message such
> as the above depending on what your specific user config was previous to
> the upgrade.

It also happens when creating a new user, with an empty home directory. 
  So it's not an old config issue.

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