Problems running graphic interface in a remote host

[Jon TURNEY]

On 20/07/2011 12:18, Ciro wrote:
 > I'm running Cygwin/X, yes, I can run xterm or rxvt locally, in fact I could
 > run the graphic interface in the remote server until I installed the new
 > Cygwin/X. I'm not sur ewhat the problem could be.

On 21/07/2011 15:06, Ciro wrote:
> I've installed the new Gygwin set in my computer and I can't seem to start
> any graphic interface in a remote host, for instance:
>
> (C)SUMFO$ xclock&
> [1]     973
> (C)SUMFO$ Xlib: connection to "xx.xxx.xx.xxx:0.0" refused by server
> Xlib: No protocol specified
>
> Error: Can't open display: xx.xxx.xx.xxx:0.0
>
> [1] +  Done(1)                 xclock&
>
>
> The DISPLAY variable is fine, I've enabled X11 forwarding (I've tried also
> without enabling this option):
>
> ForwardX11 yes
>
> but it's still failing, I've googled for this issue with cygwin but couldn't
> find anything, any help would be appreciated

I still can't tell if you are using ssh forwarding or not.

If you are using ssh forwarding, that DISPLAY setting is wrong, you should 
leave it at what sshd sets it to on the remote host (typically something like 
localhost:10.0)

If you aren't using ssh forwarding (not recommended), you need to use xhost 
on the cygwin computer to allow access by the remote host (or equivalent actions)

I'm not sure why this would have stopped working after upgrading X (although 
you don't say what version from). Perhaps you had added the X server -ac 
option in the script used to start the X server, which had been updated?

[1] http://x.cygwin.com/docs/ug/using-remote-apps.html
[2] http://x.cygwin.com/docs/faq/cygwin-x-faq.html#q-ssh-no-x11forwarding

-- 
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

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