I have to restart lightdm after run

Question

After starting the system, i've a black screen (without any screen backlight), then i have to switch to tty6 (ctrl+alt+f6), login and restart the lightdm:

sudo service lightdm restart

I'm using xfce.

Solution

1st Way to solve your issue:

Try to reconfigure lightdm (if it doesn't solve your issue then go for Alternate way mentioned below.)

• Open terminal(CTRL+ALT+T) and execute following command:

  sudo dpkg-reconfigre lightdm
  

• Then chose lightdm from the list. As shown below:

_{(source: akamaihd.net)}

• Restart your system:

  sudo reboot now
  

It should fix your issue.

an alternate way, which would solve your issue. Give it a try.

Installing a new display manager can fix your problem. Steps to install GDM(a display manager much like lightdm):

• Open terminal(CTRL+ALT+T) and execute following commands:

  sudo apt-get install gdm
  sudo dpkg-reconfigure lightdm
  

  then chose gdm from the list:

_{(source: akamaihd.net)}

    sudo reboot

• If it's still not fixed, try removing lightdm after installing gdm:

  sudo apt-get remove --purge lightdm
  sudo reboot
  

Reply if something goes wrong..

Comments

[Admin]

Can you please add to you r question what version of xubuntu you are using?

[Admin]

possible duplicate of How can I restart x-server from the command line?

[Zalazdi]

After purge remove lightdm, i'd to change xfce theme back to graybird, but it's works. Thanks.