strange X connection / protocol error

phsythax · 02-13-2007, 09:11 AM

Hello.

I boot, log into my non-root account via gdm and try to start a aterm. The window closes immediately, leaving me no error or anything, same thing with xterm. I logout and log into my root account via gdm. Now i can run both xterm and aterm perfectly, So i # su <non-root_account> and then try to run aterm again, giving me following error:

Code:

Lnex ~ # su phsythax
phsythax@Lnex /root $ aterm
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

aterm: can't open display :0.0
phsythax@Lnex /root $ xterm
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

xterm Xt error: Can't open display: :0.0

What is wrong? I get the same error if i hit ctrl+alt+F1 and try to run aterm/xterm from the console (root acount).

I have no clue what to do. Help appreciated.

David_g17 · 02-13-2007, 09:19 AM

per http://www.experts-exchange.com/Oper..._20762091.html

it is most likely you are trying to run an app from a terminal as something like "root" -- in which case as your user you need to use "xhost +" command. You can read more about it by using "man xhost"

http://www.linuxquestions.org/questi...hreadid=331779

phsythax · 02-13-2007, 09:50 AM

Quote:

Originally Posted by David_g17

per http://www.experts-exchange.com/Oper..._20762091.html

it is most likely you are trying to run an app from a terminal as something like "root" -- in which case as your user you need to use "xhost +" command. You can read more about it by using "man xhost"

http://www.linuxquestions.org/questi...hreadid=331779

None of that worked; i couldn't even run xhost.
I also added the line in /root/.bashrc as mentioned here: http://www.linuxquestions.org/questi...82#post1685482

I dont understand why this suddenly happens. I have made no change to this kind of stuff whatsoever.

nx5000 · 02-13-2007, 09:54 AM

You need to do the xhost+ as the user that opened the session.

KDM/GDM/.. Login as user

you want to allow others to access the X server:
xhost +
su - user2
xterm

if you log in as user and want to give root the access, its simpler because root has access to all files; just type this AS ROOT:
xauth merge ~user/.Xauthority