how to remove kdepim or disable nepomuk & akonadi

[China]

Caras

I want disable nepomuk and akonadi, I do not use kdepim. I try do
aptitude purge kdepim, and de system only offrer oen choice: remove
all kde desktop!!!!!!!!!!

How I can remove all kdepim packages? Or, only disable nepomuk and
akonadi? Nepomuk and akonadi is cause poor performance and sucking the
netbook's battery!!!!

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@chinabhz