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I wanted to uninstall kde-standard package (not confused with kubuntu-desktop) and all of KDE-related packages in 13.04. Seems lightdm shows too many desktops (because I installed lot of DEs) so Unity desktop selection gone off-screen. My selection is to uninstalls one of DEs I have.

What should I do?

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up vote 1 down vote accepted

Try this. Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:

sudo apt-get --purge remove kde-standard

Also to clean the list, go to /usr/share/xsessions/, and delete the ones that you want. Keep in mind this will only remove the DE from the list.

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sudo apt-get install -y ppa-purge
sudo ppa-purge ppa:kubuntu-ppa/backports
sudo apt-get autoremove

this works for me

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This works only if you were using a non-default third-party repository for KDE. – Lekensteyn Dec 20 '13 at 10:06

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