Here's the logged error that I get with DX9:
The card is a 'Mobile Intel(R) 915GM/GMS,910GML Express', running on WinXP, just so you don't have to go hunting through the old thread.
11:08:14: OGRE EXCEPTION(3:RenderingAPIException): Failed to DrawPrimitive : Invalid call in D3D9RenderSystem::_render at ..\src\OgreD3D9RenderSystem.cpp (line 2720)
The card is a 'Mobile Intel(R) 915GM/GMS,910GML Express', running on WinXP, just so you don't have to go hunting through the old thread.