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But I find it really strange, that a dedicated core should be missing the autostart feature. I thought dedicated cores are also commercially sold, and I can't believe this feature would be lacking there ....
The feature isn't lacking, you just chose "mainly used as PC", which starts up with KDE where by default you have to log into the desktop first, this can be changed to log in automaticly at boot but you will have to configure that in the KDE DEsktop settings I reckon.
The "dedicated MCE" option (during installation) starts a bare graphic environment with the lmce-launch manager and can start lmce without having to log in first. So either way you won't have a simple text console after boot.
I hope that clears things up a bit for you.