X-Server failure Ubuntu-LTS

[Matthew Kuiken]

Mike McMullin wrote:
>   I went to boot my Ubuntu and the system stopped when loading the
> X-server, with a reference to check the /var/log/Xorg.0.log file, which
> seems fine to me, except for the last entry.  "no screens found"  The
> file is attached below.  How does one set the run-level and re-configure
> X without trying to edit the /etc/X11/Xorg.conf file?

To reconfigure the xserver run the command
sudo dpkg-reconfigure xserver-xorg

If you don't want the command to ask you any questions, but just do what 
it did during the install use this command instead:
sudo dpkg-reconfigure -phigh xserver-xorg

There are a couple lines in your xorg.0.log that show why you are having 
trouble:

> (II) LoadModule: "nvidia"
> (WW) Warning, couldn't open module nvidia
> (II) UnloadModule: "nvidia"
> (EE) Failed to load module "nvidia" (module does not exist, 0)

> (EE) No drivers available.
> 
> Fatal server error:
> no screens found


The first set of lines is xorg trying to load the nvidia module for your 
video drivers.  Did you update the kernel recently?  If so, did you also 
update the restricted modules?  Perhaps you installed the proprietary 
nvidia drivers by hand?  If so, did you re-install for the new kernel?

I believe that your problem is a kernel module for the nvidia that is 
not for your currently running kernel.  I would suggest either using the 
nv or the vesa driver until you sort out your issues with the nvidia one.

-Matt