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Date: Tue, 12 Jul 2011 07:27:15 -0700
From: perryh@pluto.rain.com
To: frank@shute.org.uk
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Cc: freebsd-questions@freebsd.org
Subject: Re: ssh -X (X11 forwarding) not working from 6.1 to 8.1
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Frank Shute <frank@shute.org.uk> wrote:

> On Tue, Jul 12, 2011 at 03:18:07AM -0700, perryh@pluto.rain.com wrote:
> >
> > DISPLAY is not getting set in a remote shell started by "ssh -X".
...
> Have you tried putting:
>
> DISPLAY=:0.0
>
> in ~/.ssh/environment on the machine that's not setting DISPLAY
> properly?

Wouldn't that cause the remote app -- which is running on the
ssh server -- to (try to) use that machine's own local display?
A port-forwarded connection normally has something along the
lines of

  DISPLAY=localhost:10.0

(but it can't be hard-coded, because the "10" part will vary
depending on what-all port-forwarded connections exist).