topic DISPLAY problem in Operating System - HP-UX

DISPLAY problem

Ron Irving — Thu, 02 Sep 2010 09:14:43 GMT

Hi guys!!

Here's what may be a mult-threaded problem, but I'll start here. We have an Oracle implementation to take care of. I am setting up an rx7640 as the db server, and when I try to set the display for Xterm, I get:

# DISPLAY=10.128.11.1:0.0 ; export DISPLAY
# xclock
Error: Can't open display: 10.128.11.1:0.0
Error: Couldn't find per display information

Is there something I'm missing? This is just a small local network at 1st, and when it's setup, we'll take it onsite.

If you need any more information, please let me know.

Re: DISPLAY problem

Hakki Aydin Ucar — Thu, 02 Sep 2010 10:39:57 GMT

You need to do
xhost +

in server 10.128.11.1

Re: DISPLAY problem

Ron Irving — Thu, 02 Sep 2010 11:16:48 GMT

No luck:

# xhost +
xhost: unable to open display "10.128.11.1:0.0"

Re: DISPLAY problem

Hakki Aydin Ucar — Thu, 02 Sep 2010 11:24:36 GMT

So, are you sure on server, check it with;
# getip `hostname`

indicates the correct IP ?

Re: DISPLAY problem

Ron Irving — Thu, 02 Sep 2010 11:26:58 GMT

Here's what I got:

# getip FOBDB, (hostname of server)
10.128.11.1

Re: DISPLAY problem

Hakki Aydin Ucar — Thu, 02 Sep 2010 12:01:14 GMT

ok try this,
# whoami
and
# who am i

if they are different, you have to use logon userid to xhost , try this:

Ctrl + D
xhost +

Re: DISPLAY problem

Matti_Kurkela — Thu, 02 Sep 2010 12:04:42 GMT

> Error: Can't open display: 10.128.11.1:0.0
> Error: Couldn't find per display information

This error message indicates the X application has failed to connect to the display.

Does the rx7640 have a graphics card and a display installed?

Let's start from the screen on which you would like to see the Xterm and other output. What's the computer it's plugged into? (Is it the rx7640 server, or e.g. your Windows workstation?)

What is the IP address of the computer that is connected to the screen you want to use? Is it 10.128.11.1 or something else?

Is that computer running an X11 server program of some sort? (On Windows workstations, this would be a commercial product like ReflectionX, or a free one like Xming.)

If you're logged on locally to the rx7640 server using the graphic CDE desktop, the DISPLAY value should be already set for you (probably to ":0.0"); don't mess with it in that case.

MK

Re: DISPLAY problem

Tingli — Thu, 02 Sep 2010 14:14:14 GMT

Also, from the workstation, you need to 'Enable X11 forwarding".

Re: DISPLAY problem

Torsten. — Thu, 02 Sep 2010 14:24:16 GMT

I donwloaded "mobaxterm" from the web recently for my PC and this is working great! Try it.

Re: DISPLAY problem

Hakki Aydin Ucar — Fri, 03 Sep 2010 11:11:38 GMT

>Torsten: mobaxterm

it is great locally , but I could not make it DISPLAY working on my PC for remote server yet.

Re: DISPLAY problem

Torsten. — Fri, 03 Sep 2010 11:22:07 GMT

Just run it (e.g. on windows); ssh to the server and start your X application.

That's all.

Re: DISPLAY problem

Ron Irving — Fri, 03 Sep 2010 11:41:22 GMT

tried it from my pc, (opened a dos window.) ssh root@10.128.11.1
#DIPLAY=10.128.11.10, (ip of my laptop)
#export DISPLAY
#xclock
X connection to 10.128.11.10:0.0 broken (explicit kill or server shutdown).

Re: DISPLAY problem

Ron Irving — Fri, 03 Sep 2010 11:43:32 GMT

Oops...it was actually:

#DIPLAY=10.128.11.10.0.0, (ip of my laptop)

Re: DISPLAY problem

Torsten. — Fri, 03 Sep 2010 11:43:45 GMT

Just do

> ssh

# xclock

That's it.

From help file

MobaXterm includes an X server so that it can display X11-based
graphical programs.
By default, an X server is started at MobaXterm startup. Your DISPLAY
environment variable is automatically set and it is written in your terminal
startup message. When you use a remote computing client to connect to a Unix
computer, you can export your DISPLAY to your local Windows desktop thanks to
MobaXterm. When you use a SSH connection, if the remote server supports X11-
Forwarding, your DISPLAY is automatically set and it will be sent through the
SSH connection to your Windows desktop.
Note: if you have troubles with some kind of interfaces (Motif-based programs
for example), you can also run a full window manager by clicking on the
corresponding button in the top toolbar.

Re: DISPLAY problem

Torsten. — Fri, 03 Sep 2010 12:01:55 GMT

The problem is, "normal" X connections are likely blocked by firewalls between. When doing X over ssh it will work, if ssh works.

The value ":0.0" is different then, don't change.

Re: DISPLAY problem

Hakki Aydin Ucar — Fri, 03 Sep 2010 12:29:47 GMT

OK , I see the problem, all you need to have ssh forwarding on your remote server;

From Help Doc. of mobaxterm:
- DISPLAY settings
MobaXterm includes an X server so that it can display X11-based graphical programs.
By default, an X server is started at MobaXterm startup. Your DISPLAY environment variable is automatically set and it is written in your terminal startup message. When you use a remote computing client to connect to a Unix computer, you can export your DISPLAY to your local Windows desktop thanks to MobaXterm. When you use a SSH connection, if the remote server supports X11-Forwarding, your DISPLAY is automatically set and it will be sent through the SSH connection to your Windows desktop.

Re: DISPLAY problem

Ron Irving — Fri, 03 Sep 2010 12:31:27 GMT

ssh works no problem. xclock, on the other hand, does not. it's starting to get a little urgent to get the X functionality working. I AM in Iraq consequently.

Re: DISPLAY problem

Ron Irving — Fri, 03 Sep 2010 12:37:04 GMT

downloading mobaxterm as we speak.

Re: DISPLAY problem

Ron Irving — Fri, 03 Sep 2010 14:23:54 GMT

I think we're all not on the same page here. I'm setting up an Oracle db server on an rx7640. The oracle guy here says he needs to be able to connect to the server, as well as all the users using X functionality. Is there a way to have the server, using Xserver, facilitate that?

Again...any Oracle guys out there should know what I'm talking about(?)

Thanks

Re: DISPLAY problem

Tim Nelson — Fri, 03 Sep 2010 14:45:54 GMT

I believe all the advise here is correct.

Here is what I do for my XWindow applications.

Windows XP Laptop running:
Xming -Xwindow server
PuTTy -terminal interface

start Xming
configure a PuTTy connection for ssh with X11 forwarding enabled .

connect to server with PuTTy this configuration
execute xclock to test ( you should get an clock on your screen )

All Xwindow applications like Oracle Universal Installer will now work.