HowTo: Start games directly from GDM

Hello all. This howto will tell you how to start a game right from the sessions menu of GDM. I do this because I run Xgl and compiz, and the performance of games while they are running is pretty ******. What this does is instead of starting a window manager, and then starting a game, you can start the game directly. It's extremly easy to do, saves some memory when playing the game, and makes using Xgl/compiz and gaming on the same box much easier. I'm also a memory *****, and figure, if I can save a few megs by not using a window manager at all, why not?

All you have to do is create a game.desktop entry in /usr/share/xsessions . So for example we'll use quake4.
Open a terminal and go to /usr/share/xsessions

Code:

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cd /usr/share/xsessions

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Use a text editor of your choice and create a quake4.desktop file.

Code:

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sudo gedit quake4.desktop

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Now create the Entry.

Code:

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[Desktop Entry]
Encoding=UTF-8
Name=Quake4
Comment=Start Quake 4 straight
Exec=quake4
TryExec=quake4
Type=Application

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And there we go. Restart GDM

Code:

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sudo /etc/init.d/gdm restart

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and it should appear under sessions.

I Hope this basic howto was at least somewhat usefull. Enjoy

Hey,

I tried to do this with LightDM and Lord of the Rings Online. I am using Ubuntu 12.10. However, it doesn't show up in the selection menu in LightDM.
Here is my file:

Code:

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sudo cat /usr/share/xsessions/DHDRO.desktop
[Desktop Entry]
Encoding=UTF-8
Name=Der Herr der Ringe Online
Comment=Der Herr der Ringe Online spielen 
Exec=pylotro
Type=Application

---

Any help is much appreciated.