X11 help wanted

[yoji.atsumi at yahoo.com]

Hi Peter,

I missed your post earlier,

> Did you use ssh X forwarding? You should! 

> Something like (on U):

> % ssh -X R xclock

> will start xclock on R and forward the display to U

> With ssh -X you do not need to set a DISPLAY and need not disable X
> security with "xhost +"

The problem I ran into by what you suggest is that I set
the DISPLAY variable on R via a shell startup file.  And
it is not set as the name/address of U.  As such, the display
of the clock goes to a different monitor/screen.

I was hoping that ssh command also had an option to let
me set DISPLAY variabe, but I didn't find it.

Someone else (also named Peter) suggested below and
it works for me.

> In the /etc/gdm/gdm.conf file, change the line:
> DisallowTCP=true
> to 
> DisallowTCP=false

Regards,

Yoji


--- On Fri, 6/5/09, Peter Sabaini <peter at sabaini.at> wrote:

From: Peter Sabaini <peter at sabaini.at>
Subject:
 Re: X11 help wanted
To: ubuntu-users at lists.ubuntu.com
Date: Friday, June 5, 2009, 5:57 AM

On Thu, 2009-06-04 at 16:23 -0700, yoji.atsumi at yahoo.com wrote:
> Hi folks,
> 
> I just started using ubuntu 9.0.4.  I think I have pretty much all
> I wanted.  Except...
> 
> I can't get X11 display to come my ubuntu.  For clarisy, I will
> call the machine I am talking about (running ubuntu 9.0.4)
> U.  I can issue "xclock" command from U and the clock comes
> to the screen.  No problem.
> 
> Now, I ssh to a different host, running redhat, and I will call
> this machine R.  Here's what I have done:
> On U,
>   I issue "xhost +"
> On R,
>   I export DISPLAY variable as
 xxx.xxx.xxx.xxx:0.0.  Then issue
>   "xclock" command
> What I get on R is:
>   Error: Can't open display: xxx.xxx.xxx.xxx:0.0
> Of course, nothing comes to U's screen.
> 
> Would somebody please advise me as to what cure there is,
> what stupidity I have committed, etc?
> 
> Regards,
> 
> 
> Yoji
> 
> 

Did you use ssh X forwarding? You should! 

Something like (on U):

% ssh -X R xclock

will start xclock on R and forward the display to U

With ssh -X you do not need to set a DISPLAY and need not disable X
security with "xhost +"

hth,
peter.





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