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Ubuntu 16.04 (EE) xf86OpenConsole: Cannot open virtual console 2 (Permission denied)
sudo apt-get install xserver-xorg-legacy

Edit /etc/X11/Xwrapper.config

allowed_users=anybody
needs_root_rights=yes
@gabefair

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commented Apr 20, 2018

Thank you so much for this! Installing the v390 nvidia drivers for a GTX 1070Ti broke xorg for me

@edeetee

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commented Jul 30, 2018

Thanks, worked for me. Didn't personally need to edit Xwrapper though.

@martinsteeg

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commented Sep 22, 2018

Hi there,
this and "The system is running in lo graphics mode" screen is a problem I'm struggling with - since a long time ago.
The above documented and anything I found on the net (incl. Ubuntu forums) didn't work for me

The following is my solution

1.) From the "The system is running in lo graphics mode" screen exit to a console and login as root

2.) Remove unity, lightdm and ubuntu-desktop (with all the wrong configuration data)
$ apt-get remove unity lightdm ubuntu-desktop
$ dpkg --purge unity lightdm ubuntu-desktop

if dpkg is warning about configuration files or directories it cannot remove, remove those files/directories manually, e.g.:
$ rm -rf /etc/lightdm /var/lib/lightdm-data

3.) Newly install unity, lightdm and ubuntu-desktop
$ apt-get install unity lightdm ubuntu-desktop

After the following command, the lightdm login screen appears and all should work fine...
$ service lightdm start

Martin

@GourouLubrik

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commented Mar 18, 2019

I was unable to start xfce4 / lightdm on openmediavault 4 (based on debian stretch).
I was thinking to reinstall everything... but I won't need to because of your lifesaving fix. <3

@joseananio

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commented Jun 26, 2019

on Debian*

dpkg-reconfigure xserver-xorg-legacy

select anybody as allowed users

thank you @alepez

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