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I've been experimenting with various Desktop Environments, including LXDE, XFCE, KDE.

I'm returning to Unity, and I would like my login screen back to the default for 12.04. I think that it changed when I tried KDE, probably because of an answer I gave to a prompt that I didn't understand.

Any ideas?

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does this one answer your question? askubuntu.com/questions/2007/… –  hbdgaf May 1 '12 at 10:28
If it does, it certainly could be more explicit. I'm confused after reading it. But I'm not at all sure if it is answering the same question. –  Eric Wilson May 1 '12 at 10:57
Referring to the boot splash screen is a duplicate to this one and referring to revert back to lightdm login screen is a duplicate of this question –  Anwar Shah Jul 31 '12 at 8:25
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1 Answer

up vote 8 down vote accepted

For getting back the default boot loading, use the following :

sudo update-alternatives --config default.plymouth , then choose whichever bootscreen you prefer, for default /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth, afterwards run this command sudo update-initramfs -u

For the login screen, run this command : sudo dpkg-reconfigure lightdm

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