xhost: unable to open display ":0.0"

[jbk]

David Kramer wrote:
> jbk wrote:
> 
>> # su -
>> -bash: \e[3~:delete-char: command not found
>> Xlib: connection to ":0.0" refused by server
>> Xlib: No protocol specified
>>
>> xhost:  unable to open display ":0.0"
>>
>> This symptom occured after upgrading Fc3 to Fc4. It only happens when 
>> I login as root locally. If I SSH from another machine and then 'su -' 
>> I have no trouble.
>>
>> "xhost +localhost" is defined in root's .bash_profile.
>>
>> A fresh install on my laptop did not exhibit this problem.
>>
>> I am googling the mailing lists but have yet to find reference to this 
>> particular circumstance.
> 
> 
> I assume you started X as a regular user.  That regular user has to 
> adjust the security of the X session, not root.  Put the "xhost 
> +localhost" in _that_ user's .bash_profile.

It is. In fact if I just "su" instead of "su -" I have no 
problem.