I'm not sure yet. This is the config file generated when running on my
desktop with the GL ES emulator.
Render System=OpenGLES Rendering Subsystem
[OpenGLES Rendering Subsystem]
Display Frequency=72 MHz
RTT Preferred Mode=Copy
Video Mode= 800 x 600
The biggest difference should be the mode and frequency settings.
This file is called ogre.cfg.