Thanks for posting the script, I was just going to ask. ;) I haven't touched the Tcl/Tk packages for quite some time, so I suspect something else is causing the problem. In the video I see that there is a window appearing at the top left corner of the screen, but it seems to be undecorated and lacking the text (which could indicate a font problem), or it is mostly off-screen, so that only its right edge can be seen. Let's modify the script, and add an image to the label, so that we can see something even if the text is missing for some reason: --- snip --- #!/usr/bin/wish image create photo logo -file $tk_library/demos/images/tcllogo.gif label .hello -compound bottom -text "Hello World: Tcl/Tk" -image logo pack .hello wm geometry . +100+100 --- snap --- The result should be the Tcl/Tk logo (a blue feather on a red background) with the "Hello World" message written above it. I am also moving the window a bit off the edge of the screen, so that we can better see what's going on.