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When booting Lubuntu 14.04, a terminal screen is shown instead of the usual graphical log-in screen. Then, I have to type sudo lightdm and use Ctrl+Alt+F7 to switch to the graphical log-in screen.

I checked cat /etc/X11/default-display-manager as described on https://askubuntu.com/a/84485/288322; this included /usr/sbin/lightdm already. I also did as described on https://askubuntu.com/a/457694; that works fine.

How can I repair the system so that it automatically boots the graphical log-in screen again?

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Rantanplan
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1 Answers1

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Run the following command in terminal:

sudo gedit /etc/default/grub

This opens Grub boot loader config file with text editor.

Do below changes:

Uncomment the line #GRUB_CMDLINE_LINUX_DEFAULT="quiet splash", by removing # at the beginning, which will enable the Ubuntu purple screen.

Change GRUB_CMDLINE_LINUX="text" to GRUB_CMDLINE_LINUX="", this makes Ubuntu boot into Graphical Mode.

Comment this line #GRUB_TERMINAL=console, by adding the # to the beginning.

After saved the changes, update grub via command:

sudo update-grub

Restart your computer and see the result.

Reference

Tim
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  • The file was already looking as you described. I ran sudo update-grub anyways, restarted the computer, but the problem continues to exist. – Rantanplan Jun 10 '14 at 19:13
  • I thought it might... Different problem. Try sudo apt-get install fglrx, then sudo update-grub? – Tim Jun 10 '14 at 19:19
  • After doing that, the problem continues to exist. Now, I also did as described in http://askubuntu.com/a/195916 for my graphic card GeForce 9300 GE, but that also did not help. For some reason, it is not any longer possible to log in on the log-in screen after 'sudo lightdm' and Ctrl+Alt+F7; here I get the message Error reading existing Xauthority: Failed to open file '/home/username/.Xauthority': Permission denied. Finally, I tried sudo update-grub, but it did not improve. Shall I re-install Lubuntu 14.04? – Rantanplan Jun 11 '14 at 11:19
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    I re-installed Lubuntu 14.04; works fine. Thanks! – Rantanplan Aug 15 '14 at 14:03