I've installed XFCE Desktop environment, but when I decide to switch back to Unity, while uninstalling the
XFCE packages, the
LightDM keep starts like XFCE, and I want to restore the
Unity one. I think that is called Unity Greeter. Can someone help me?
I installed xubuntu-desktop on top of normal Ubuntu 14.04. Then I also noticed that the greeter had changed. I still use the xubuntu desktop, but I changed the greeter back by adding a line
Update: Now on a new install of Ubuntu 14.10 + xubuntu-desktop on top of that, there is no directory
/etc/lightdm. But following advice from here I created the directory
/etc/lightdm/lightdm.conf.d and a file
/etc/lightdm/lightdm.conf.d/50-myconfig.conf with contents
and I get the unity greeter back.
I didn't test it, but I suspect that @SampoSmolander might have the best approach.
Alternatively, I had success by removing the gtk greeter -- apparently this is what XFCE uses.
sudo apt-get purge lightdm-gtk-greeter
There still remains the tricky issue of getting rid of XFCE's mouse-themed greeter wallpaper:
- How do I change the wallpaper of the login screen?
- How do I set the LightDM wallpaper in Ubuntu 14.04?
Note: It looks like multiple desktop environments install the lightdm-gtk-greeter package (including XFCE and MATE). Interestingly, once you remove that package, the configuration files that @SampoSmolander discusses are no longer present.
I had a similar problem. @SampoSmolander's answer might be the right way.
When using Ubuntu 14.04 you'll have to add the line
I wrote a detailed how-to, but I don't know if it works, because LightDM reconfiguration seems to have solved the problem for me.
cd /usr/share/lightdm/lightdm.conf.d && sudo ln -s 50-unity-greeter.conf 99-unity-greeter.conf and reboot the system.
The problem is caused by
lightdm-gtk-greeter installing file called
60-lightdm-gtk-greeter.conf which overrides the unity greeter. I guess we should be able to just do
sudo update-alternatives --config lightdm-greeter and select
unity-greeter package is incorrectly built and it does not support
The above command workarounds the problem by creating a symbolic link with higher number so it can override the incorrect greeter selection. I'm using symbolic link to be better prepared for the future in case the file
50-unity-greeter.conf is ever upgraded by system package.
sudo dpkg-reconfigure lightdm
I had a similar problem, I lost the greeter on user switch. The solution was in the package light-locker. Just reinstall, (or install if it was removed)
sudo apt-get install light-locker
In my case it was uninstalled, but the key is the package.
You could try enter this in the terminal, and it might fine this way I say:
sudo apt-get autoremove lightdm sudo apt-get install --reinstall lightdm-gtk-greeter
if this dos not work you could try enter again:
sudo dpkg-reconfigure -a lightdm-gtk-greeter
and it might work fine this way too.
To set the unity greeter as default, in Ubuntu 16.04 login screen, edit the file
and change the "greeter-session" line to "greeter-session=unity-greeter"