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Just go to System Settings -> User Accounts and disable automatic login. That way, you will always be prompted for the password and it's in that login screen you can choose which environment to login to.


System Settings -> User Accounts -> slide the automatic login button to off Alternativelly, Open the command line / terminal (Ctrl+Alt+T) Enter the following command sudo nano /etc/lightdm/lightdm.conf You should see in there something like [SeatDefaults] autologin-user=yourusername where yourusername is your actual username. Remove ...


You can install another display manager such as LightDM, MDM, Slim, GDM sudo apt-get install lightdm select LightDM sudo dpkg-reconfigure lightdm You can add greeters to have nice themes How to change the LightDM theme/greeter? There is also lightdm-kde-greeter mentioned here How do I install KDE and retain LightDM as a login manager?


For 14.04 use the following command to set lightdm back to normal sudo /usr/lib/lightdm/lightdm-set-defaults --greeter unity-greeter reboot for the changes to take effect This works for going from xubuntu and back to unity-greeter ubuntustudio and back and kubuntu back to unity-greeter as well.


Your system has been set to automatically log you in - this was a choice you probably made at install time. You can switch desktops by choosing logout (not shutdown or reboot) which will take you to the login screen where you can then choose a desktop. Choosing a desktop is persistent - next time you reboot it will take you back to the desktop you have ...


If you can't login normally because a file 50-unity-greeter.conf has been impaired, you can try this: PressCtrl+F6 Input Login and your password Type startx Open any directory and go to a hardDisk and search greeter. When you see for example: unity-greeter_14.04.10-0ubuntu1_amd64.deb, or anything like greeter.deb, execute this file. reboot and that's ...


Assuming a recent Ubuntu version and trouble with signature on the kernel or initramfs... Boot, press shift to display the grub boot menu where you should see Advanced options for Ubuntu ... use the arrow keys and select it, then press enter. A new menu appears, I hope you have several entries like Ubuntu, with Linux ... NOTE: the ones having a ...

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