X forwarding doesn't work

[Sebastian Krzyszkowiak]

On 8/15/09, Joshua Judson Rosen <rozzin at geekspace.com> wrote:
> Michael Tansella <michael-tansella at gmx.de> writes:
>>
>> I want to start midori in the freerunner and forward the GUI tt my Linux
>> Host
>> (Kubuntu)
>>
>> I tried it the following way, but it starts on the freerunner instead of
>> the
>> host, any idea?:
>>
>>
>> simarillion at simarillion-laptop:~$ ssh -l root -X -v 192.168.5.202
> [...]
>> root at om-gta02 ~ $midori
>
> My guess is that /etc/profile on the FreeRunner is overriding the
> $DISPLAY environment-variable that sshd sets up, or something along
> those lines. You didn't mention which distribution you're using
> (OM2008.x? OM2009? SHR?), so I can't be sure, but...:
>
> In SHR (which is what I run), this is what happens: ssh request X11
> forwarding, sshd sets up forwarding and sets $DISPLAY to
> "localhost:10" (for the first connection--other simultaneous
> connections get higher numbers), my shell starts and sources
> /etc/profile, /etc/profile contains a line that does
> "export DISPLAY=localhost:0".
>
> It wasn't always like this; I imagine that this was added to
> /etc/profile as a bugfix because people didn't like having to do
> "export DISPLAY=:0" to launch apps (and have them display locally on
> the FreeRunner) from SSH logins.
>
> Perhaps a better option would be to change /etc/profile so that it
> instead does:
>
>     if [ "$DISPLAY" = "" ]
>     then
>         export DISPLAY=localhost:0
>     fi
>
> ... or something equivalent. Something like this would also work:
>
>     logger -t login "Login with DISPLAY on ${DISPLAY:=localhost:0}"
>
> That posts a note about the login, and which DISPLAY value it used, to
> syslog. The ":=" means `if the variable already has a value, use that
> value; otherwise assign the following value to it'.

I just sent patch fixing that. Hopefully next images will have that fixed.

-- 
Sebastian Krzyszkowiak
dos