I was just experiencing this same error.
My roommate is on debian-users so I'll ask him if he has seen
anything about this.

Tim

On Thu, Dec 07, 2000 at 10:13:18AM -0600, Jason J wrote:
> Running Debian Woody. Finally decided to try the X 4.0.1 packages. 
> Installed them. Now i get the following error
> 
> X: *user not authorized to run the X server*, aborting.
> 
> I switched back to 3.3.6 and that same error is still there.  So its 
> something independent of there configs. 
> Root has no problem start 4 or 3. I created a fresh user just as a test, 
> and that user gets the same error. Only root can start the server, but i 
> cant find where I can change that to allow all users.
> 
> I got rid of the rootonly line in Xwrappers
> I change the second line of Xsession to Anybody just to make sure.
> 
> 
> Any help would be appreciated
> 
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