Hi guys!

I have this snippet:

require "rubygems"
require "gosu"

a = Gosu::Window.new(640,480,false)
a.show

Currently, on my Linux distribution, Backtrack 4 ( based on Ubuntu 8.10, I think ), the show line hangs my whole script. Nothing happens, the window doesn't appear. I followed the instructions written @ http://code.google.com/p/gosu/wiki/GettingStartedOnLinux .
What details should I provide you? ruby -v gives this :

ruby 1.8.7 (2008-08-11 patchlevel 72) [i486-linux]

what happens when you run the example programs?

The same. The window still isn't showing.

Do you not get any error messages?

No output. Nothing.

It's perfectly normal that "show" blocks forever, but it should still open a window :(

Are you using some kind of compositing WM like Compiz? If so, can you try it without that one? That's the only troubleshooting option that regularly worked for me…

We should probably find out whether it's doing its magic but not showing a window, or it's hanging in the window creation bit. Try running this and let us know what it prints, if anything:


require 'gosu'

class LookABug < Gosu::Window
  def show
    @last = 0;
    super
  end
 
  def update
    t = Gosu::milliseconds
    if @last < t - 1000
      puts "update"
      @last = t
    end
  end
end

puts "before main loop"
LookABug.new(100, 100, false).show


It should only print once per second so's not to flood you with update update update. I doubt this will be a useful diagnostic, but it's worth a shot.

Hey!

Sorry for the delay!

I ran the code you provided ( for a few seconds ) , and it generated this :

before main loop
update
update
update
update
update
update
update

Still, nothing shows on the screen.

Ah, so it's not actually hanging then. Like Julian said, are you running a compositing window manager, and have you tried turning off compositing?

Does other software that uses OpenGL work?

I searched on my computer for a compositing window manager, but I couldn't find one. I think I'm not running one. I searched for compiz, but I didn't find it. Could there be others? As for OpenGL, Blender seems to run fine.

Is your desktop GNOME or KDE?
I think Backtrack 4 comes with KDE by default.

On Ubuntu, for me, gosu runs fine on GNOME with compiz.. so it may just be KDE..
Anyone else tried KDE with gosu before?

Yeah, KDE's the default.

Has anyone tried to run Gosu under KDE?