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X-Server refused

I had the following error message after logging in as root with su and the start of an application:

:code:root@Pinux:/home/roen# firestarter
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
(firestarter:4890): Gtk-WARNING cannot open display::code:

1. Solution:

Use sux instead su.

The explanation, from the #kanotix IRC channel:
"<slh> sux is a wrapper for su, which also pays attention to the x11 magic cookies"

thanks to slh :-)

2. Solution:

As a logged in user:
:code:# xhost +:code:
Then su...
As new user:
:code:# export DISPLAY=:0.0:code:

Greetings, Andy ;-)

3. Solution:

In the file /etc/X11/Xsession type the following line:
:code:xhost +local::code:
Then I have automatically access, e.g. with my "root Midnight Commander", to X in the KDE console.

Ciao Martin
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