Black God

How to fix “X: user not authorized to run the X server, aborting.”?

This is just a simple tips to solve a error message when you start your X session with “startx” command as normal user. The error message may be like this:

blackgod@debian:~$ startx

xauth:  creating new authority file /home/blackgod/.Xauthority

X: user not authorized to run the X server, aborting.

In linux, by default root user is allowed to run X server in most cases. So you don’t face this issue while running “startx” as root user.

Basically the Xorg X server needs to be configured to to authorize this user. Where should we configure this?

/etc/X11/Xwrapper.config – This file has as setting called “allowed_users”. It can accept three values:
1. root
2. anybody
3. console
The above values are self explanatory. You can edit this value to set as anybody for normal user to start X server. If normal user starts X server from console, console can also be set. It can be like this.
allowed_users=anybody
In Debian and its derivatives like Ubuntu, you can run the following command to do it in user friendly screen as shown below.
# dpkg-reconfigure x11-common

5 comments for “How to fix “X: user not authorized to run the X server, aborting.”?

  1. Genilson
    April 26, 2013 at 3:58 pm

    Thanks, it helped me a lot!

  2. April 11, 2013 at 5:44 pm

    Generally I don’t learn article on blogs, but I would like to say that this write-up very forced me to try and do so! Your writing style has been surprised me. Thank you, very nice article.

  3. Max
    August 16, 2012 at 11:31 am

    Thanks

  4. Rukmal Dias
    November 3, 2011 at 11:12 am

    It works fine, thanks :)

Leave a Reply

Your email address will not be published. Required fields are marked *