KDE su apps can't find X server?

RedNovember · 10-16-2006, 08:06 PM

On Debian etch, kernel 2.6.17, I've recently been getting the problem of KDE su prompts erroring on the correct password (saying it is wrong). Now I know for a fact that it is not wrong, because I can log in as root from the console. However, I cannot run any graphical apps:

Code:

rednovember@debian:~$ su
Password:
debian:/home/rednovember# synaptic
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified


(synaptic:6368): Gtk-WARNING **: cannot open display:
debian:/home/rednovember# konqueror
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

konqueror: cannot connect to X server :0

Now this is a major problem as I cannot run synaptic. I tried logging in from a console login as root (Debian doesn't allow graphical root login, apparently). This worked, and I was able to startx, but it started GNOME, not KDE which I use. I don't know how to change the Desktop Environment from the console.

Why are root apps not connecting to my X server? How can I fix this? All user apps are doing fine with X and KDE.

EDIT: And here I was thinking this was a unique problem seeing as I'd never heard of it.
http://www.linuxquestions.org/questi...d.php?t=492566
http://www.linuxquestions.org/questi...d.php?t=492332
http://www.linuxquestions.org/questi...d.php?t=492258

Woops.

craigevil · 10-16-2006, 10:21 PM

You need to do something along the lines of kdesu synaptic,or sux synaptic.

The reason root can't use X is you are already logged in as a user.

The password thing is covered in another thread. Quickest way to get help for these kind of things is in IRC. Open any IRC client and do:
/server irc.debian.org
/join #debian

HappyTux · 10-17-2006, 12:19 AM

Quote:

Originally Posted by RedNovember

On Debian etch, kernel 2.6.17, I've recently been getting the problem of KDE su prompts erroring on the correct password (saying it is wrong). Now I know for a fact that it is not wrong, because I can log in as root from the console. However, I cannot run any graphical apps:

Code:

rednovember@debian:~$ su
Password:
debian:/home/rednovember# synaptic
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified


(synaptic:6368): Gtk-WARNING **: cannot open display:
debian:/home/rednovember# konqueror
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

konqueror: cannot connect to X server :0

Now this is a major problem as I cannot run synaptic. I tried logging in from a console login as root (Debian doesn't allow graphical root login, apparently). This worked, and I was able to startx, but it started GNOME, not KDE which I use. I don't know how to change the Desktop Environment from the console.

Why are root apps not connecting to my X server? How can I fix this? All user apps are doing fine with X and KDE.

EDIT: And here I was thinking this was a unique problem seeing as I'd never heard of it.
http://www.linuxquestions.org/questi...d.php?t=492566
http://www.linuxquestions.org/questi...d.php?t=492332
http://www.linuxquestions.org/questi...d.php?t=492258

Woops.

Try the following in your /root/.bashrc changing to your username of course.

Code:

## allows me to run X program as root

export XAUTHORITY=/home/stephen/.Xauthority

RedNovember · 10-17-2006, 03:02 PM

I just did

Code:

xhost +
su
synaptic

RedNovember · 10-18-2006, 06:32 PM

I found a more permanent solution at the bottom of this post:
http://www.linuxquestions.org/questi...hreadid=285904
This will give all users x authorization.