I have Ubuntu 13.10 installed. I then installed lubuntu 13.10 (sudo apt-get install lubuntu-desktop) too. As a result the login screen has changed and I can no longer get an on screen keyboard.
How can I restore the login screen to the original Ubuntu default?
Since the OP is a bit lazy(!), I'm going to post the answer myself. Most of the times, thesudo dpkg-reconfigure lightdm solution doesn't work. You'll need to change the settings manually either by using lightdm-set-defaults or editing /etc/lightdm/lightdm.conf.
Open up lightdm.conf:
gksudo gedit /etc/lightdm/lightdm.conf
You must have the following settings under [SeatDefaults]:
user-session=ubuntu
greeter-session=unity-greeter
Save and reboot.
sudo apt-get purge lightdm, it would ask some things during the uninstallation; chosse "ok" then "lightdm". If it gives you an error, uninstall again with the same command. Then reinstall; sudo apt-get install lightdm. Done :)
lightdm.conf does not exist (Ubuntu 14.04.3). In installed lubuntu but now I cant to get back to a clean Ubuntu desktop.
Mar 17, 2016 at 7:56
My login screen was changed after I installed KDE. Anyway, one possible solution (what worked for me because in my research I found others but they didn't work) was to uninstall and reinstall lightdm:
sudo apt-get purge lightdm
sudo apt-get install lightdm
Of course, I had to specify what display manager I want (gdm, kdm or lightdm - after I broke my lightdm I used gdm as default). For this you have to run
sudo dpkg-reconfigure gdm
My login screen was also changed to KDM after installing the KDE desktop on my Ubuntu 13.10 installation. The quickest solution for me was to run the following command:
sudo dpkg-reconfigure lightdm
And then you can choose for lightdm as a default instead of KDM.
NO need to sudo apt-get purge or reinstall..
if this is after installing lubuntu just edit the lubuntu lubuntu.conf
cd /etc/lightdm/lightdm.conf.d
sudo gedit 20-lubuntu.conf
then paste this to it:
user-session=ubuntu
greeter-session=unity-greeter
thats work very well,
I read in this post: How To Install LightDM 1.7.0 On Ubuntu 13.10/13.04/12.10 And Linux Mint 16/15/14 and I ran:
sudo add-apt-repository ppa:lightdm-gtk-greeter-team/stable
sudo apt-get update
sudo apt-get install lightdm-gtk-greeter
but I disliked it, so I can't solve to my display manager default for Ubuntu, and after I did this:
Open lightdm.conf for editing in nano text editor:
sudo nano /etc/lightdm/lightdm.conf
You must have the following settings under [SeatDefaults]:
user-session=ubuntu
greeter-session=unity-greeter
Save and reboot.
It's great, this works. Thanks for your support.
sudo dpkg-reconfigure lightdmworked after I installed gdm.sudo gedit /etc/lightdm/lightdm.confand added this:[SeatDefaults] greeter-session=unity-greeter user-session=ubuntuSorry but not for a lack of trying and despite reading (askubuntu.com/editing-help#comment-formatting) I am unable to format the comment - it should be on 3 lines. I then removed lightdmsudo apt-get purge lightdmand reinstalled itsudo apt-get install lightdmand after rebooting it worked. What a drama! And a waste of 2 hours of my life!sudo apt-get remove lightdm-gtk-greeter && sudo apt-get install --reinstall unity-greeterworked for me. Question on that here