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I installed kwin yesterday, using this command: sudo atp-get install kde-window-manager

then I thought it didnt work, so I also did this command, then rebooted sudo apt-get install kde-workspace-bin

now it did work.

However I really want to remove it because I lack disk space. How do I completely remove kwin, to ubuntu basics. So that the login screen is back to the original ubuntu login screen and I have more freed disk space.

I tried sudo atp-get remove kde-window-manager and sudo apt-get remove kde-workspace-bin

the login screen is still different from the original ubuntu login screen, and I gained a mere ~12mb disk space instead of ~110mb used for kwin.

Thanks in advance

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    sudo apt-get purge <package> should do it. – SimplySimon Jun 23 '13 at 11:16
  • What Ubuntu release are you using? – Mitch♦ Jun 23 '13 at 11:24
  • Precise Pangolin Ubunbtu 12.04 – user169662 Jun 23 '13 at 19:04
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    Jonathan - you appear to have two accounts. Please click the contact-us link at the bottom of this page and request that your accounts are merged. Thanks. – fossfreedom♦ Jun 23 '13 at 21:35
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All packages installed as a result of being dependencies of the ones you have installed manually, are still marked as installed automatically. Run

sudo apt-get autoremove

to remove the packages not listed as "required" anymore on your system.

So, basically, let's say that the installation of package-a requires package-b, then removing package-a does not remove package-b as well. By running apt-get autoremove, it will notice that there's no requrement anymore for package-b and it will offer to remove it.

the login screen is still different from the original ubuntu login screen

That's probably because you pulled in kdm, the KDE display manager and login screen. Remove it as well if the previous command didn't do that already:

sudo apt-get remove kdm
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