[SOLVED]: ssh + xterm: DISPLAY is not set.

Message

ONEEYEMAN · Post by **ONEEYEMAN** » Thu Jun 16, 2011 8:40 pm

Hi, ALL,
I have a new laptop with fresh am64 Gentoo install.
What I am trying to do is do an "ssh" to my office server. When I get a connection I am trying to run "xterm&".
Doing it I am receiving following errors:

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xterm Xt error: Can't open display:
xterm: DISPLAY is not set

I also have much older laptop with Gentoo install. Doing ssh + xterm does not result in any errors.

What might be the problems?
I checked "echo $DISPLAY" on the new laptop and I got the value.

What else might be the cause? I'm not trying to connect as root just as regular user.

Thank you.
What

sirlark · Post by **sirlark** » Thu Jun 16, 2011 9:07 pm

First things first, check your settings. On your server, in /etc/ssh/ssh_config make sure ForwardX11 is set to 'yes'.

You can leave it set to 'no' but then you have to use the '-X' commandline option to override this setting.

I have my ForawardX11 set to 'no', and when I ssh into my server without the -X I get the same error.

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ssh -X myuser@myserver

The above works.

ONEEYEMAN · Post by **ONEEYEMAN** » Thu Jun 16, 2011 11:40 pm

sirlark,
This is what happened when I tried with "-X":

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IgorReinCloud igor # ssh -X -p 1313 igor@X.X.X.X
igor@X.X.X.X's password: 
Warning: untrusted X11 forwarding setup failed: xauth key data not generated
Warning: No xauth data; using fake authentication data for X11 forwarding.
Linux host 2.6.31-21-generic #59-Ubuntu SMP Wed Mar 24 07:28:27 UTC 2010 x86_64

To access official Ubuntu documentation, please visit:
http://help.ubuntu.com/

Last login: Thu Jun 16 16:32:57 2011 from netblock-72-25-106-2.dslextreme.com
igor@host:~$ xterm&
[1] 12502
igor@host:~$ Invalid MIT-MAGIC-COOKIE-1 keyxterm Xt error: Can't open display: localhost:12.0

[1]+  Exit 1                  xterm

Thank you.

wthrowe · Post by **wthrowe** » Fri Jun 17, 2011 3:28 am

Don't know if it's still relevant (it seems to be, but maybe something's happened that I don't know about), but [bug]237778[/bug] from a couple years ago suggests that ssh -X is broken and won't be fixed, and that you have to use ssh -Y instead now.

ONEEYEMAN · Post by **ONEEYEMAN** » Fri Jun 17, 2011 3:55 am

OK,
Will try -Y when I come home.

Thank you.

ONEEYEMAN · Post by **ONEEYEMAN** » Fri Jun 17, 2011 7:36 am

Yes, -Y is what I was looking for.

Thank you.