X client 'Can't open display' on OS11

English Network/Internet
1

I’m having a difficult time getting a remote x client to display on my machine. I have an xserver running locally, and connect via ssh.

I turned on X11 forwarding in remote host sshd_config:
X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes

I set the local ssh(OpenSSH) connection for X11 Forwarding.

An X server, Xming, is running locally.

X on the remote host is running without listening on port 6000:

ps -ef |grep X

root 1940 1924 0 Aug20 tty7 00:34:30 /usr/bin/X :0 -audit 0 -br -auth /var/lib/gdm/:0.Xauth -nolisten tcp vt7

netstat -an |grep 6000 returns nothing.

Running an X client doesn’t work:
oracle@oraman:~> xclock
Error: Can’t open display:

It’s my understanding that with tunneling I don’t have to turn on TCP listening for ssh on the host.

I checked the SDB and seem to have things set up correctly, but it’s not working.

What am I missing?

2

Sorry, no one has answered you. I would love to help you out, except I have the exact same problem, and I don’t know what to do either. Did you ever figure this out?

3

I use suse 11.3 on PIII, loaded with <init 3>, as gateway to/from internet. I access my data on this gateway with, for example, <gedit &> at home or outside with xming+putty. On suse 11.4/12.1 i cant’t use gedit in such way. I get error: “Cannot open display”. This issue is from suse 11.4/12.1 only, because there is no problems with 11.3.

4

On 11/21/2011 08:46 AM, makauskas wrote:
> I get error: “Cannot open display”.

is this as a normal user, or as root?

i assume you have not logged into the Gnome GUI as root and i guess
you are wanting to launch a graphical application (like gedit) in gnome
with root powers…to do that you need to be in the terminal as a
normal user, then issue this command:


gnomesu gedit

and, give the root password when asked for…

does that work for you?

–
DD http://tinyurl.com/DD-Caveat
dump Flash: http://www.bbc.co.uk/news/technology-15797399

5

Set DISPLAYMANAGER_REMOTE_ACCESS=“yes” is not enough

6

I enable “Remote root login in the display manager” and “Remote access to the X server” aditionaly.
Then log as normal user
<gnomesu gedit> through the same “Cannot open display” error in putty window.
And I’m not asked for any password !

With <su> in putty
<init 5>
<gedit>
I have the same error “Cannot open display”

But with suse 11.3 I can log as normal user into remote and run gedit in window on local WinXp. Suse 11.3 is loaded with run level = 3.
With suse 11.4/12.1 can’t do it remotely.

7

sorry, i can’t help any…hope someone else can…

–
DD

8

Ok. I’ve been using suse 11.4 on this box over a year after success reinstall.
I’ve install suse 12.3 on asus Eee ram-1gB now and have the same problem on clean install as previously suse 11.4 on PIII.

I can connect (xming+putty) from my win-Xp box to my old PIII with suse 11.4 without problems. But can’t to fresh suse 12.3 installed on new asus with same putty setings.

On latter 12.3 box:
1 echo $DISPLAY not set
2 xhost + : unable to open display …
3 .Xauthority not created (i’ve delete old 0 byte long .Xauthority file). Why?

I’ve try:
1 sshd_config from suse 11.4 on suse 12.3
2 disable ipv6 via YaST and check 127.0.0.1 localhost on top of /etc/hosts file
3 reinstall openssh on suse 12.3
4 ???

The same problems exist with root account too. But xauth list’s MIT-MAGIC-COOKIE-1 in /root/.Xauthority

Console run startx without problems.

9

Please start a new thread, the one you’re joining now is old, very old.

10

old, but no solution.

if you have two suse machines arouind the 12.3 release, as well as the usual:
xhost +
set DISPLAY on the ssh console

you have to get X to start on the remote machine without “-nolisten TCP”

ps ax | grep listen
will show it up

the nolisten was from the /etc/X11 configs
so grepping /etc/X11 and commenting out all the offending line.

ie as root
cd /etc/X11
grep -ir “listen” *

I also set everything in /etc/sysconfig/displaymanager that looked problematic to “yes”
then ran SuSEconfig for good measure
after that it still needed a reboot to work, restarting X (ctrl alt backspace twice) didn’t work.

11

ipv6 should be enabled

12

I am not sure what you are trying to do, but this is a thread from 2008 (!). So as well as the peoblem as the answer are likely to be for old versions and old infrastructure.

When you have a problem, please start a new thread in the best fitting forum with a good title.

This thread is CLOSED to avoid further confusion.