Hi, I have a project which runs some drawing code at backend using an excellent python module graphics.py. However I ran into some troubles when I started to run it on Udoo when I was connected using ssh. I am using Putty to connect to Udoo. I googled a bit and I found out about X11 forwarding, which should fix the issue, but sadly it didn't. I got an error message (at the bottom of the post). I checked whether X11 is enabled in /etc/ssh/sshd_config and it indeed was. Has anyone tried X11 on Udoo and if so were you successfull? Error: X11 connection rejected because of wrong authentication. X11 connection rejected because of wrong authentication. Traceback (most recent call last): File "Prism.py", line 12, in <module> from graphics import * File "/home/udooer/graphics.py", line 176, in <module> _root = tk.Tk() File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1767, in __init__ self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use) _tkinter.TclError: couldn't connect to display "localhost:10.0"