Simple question: How to make X windows appear on remote machine (not X forwarding)

[Dustin Spicuzza]

Hey,

I have a machine sitting next to me that I ssh into, logged in as user 
Y. On the machine, I have X running, and I'm logged in as the same user 
Y. Is it possible to execute an application over ssh, that makes its 
windows show up on the machine next to me? I tried setting the $DISPLAY 
variable, but no luck so far. Thanks.

(as to why I want to do this... using a small touchscreen, and trying to 
use GDB on the app while running on the touchscreen. Obviously using GDB 
on the small touchscreen is quite annoying, so trying to find an 
alternative... )

Dustin

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