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I was looking to disable guest login and I found one link 'remove guest login ubuntu' http://www.ubuntugeek.com/ubuntu-tiphow-to-disable-guest-account-in-ubuntu-12-04precise.html

I did this: Open /etc/lightdm/lightdm.conf file

from your terminal using the following command

gksudo gedit /etc/lightdm/lightdm.conf

Add the following line

allow-guest=false

Save and exit the file

After I restarted my laptop I see "The system is running in low-graphics mode"

enter image description here

My question is: How can i fix this problem? should i re-install ubuntu?

Pierre.Vriens
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thumper2
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2 Answers2

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It used to be that /etc/lightdm/lightdm.conf had some configuration in it. This is not longer true in Ubuntu 14.04. Old guides assumed the presence of some configuration in it. Now you need to add a SeatDefaults section if you wish to use that method:

[SeatDefaults]
allow-guest=false
muru
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You can change the /etc/lightdm/lightdm.conf file back to the way it was by booting from an Ubuntu Live CD (or live flash drive) and then browsing your drive in Nautilus (file manager) to mount it and then edit it with gksudo gedit /media/(drive name here)/etc/lightdm/lightdm.conf.

ILoveGit
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