945GM/I810 OpenGL issue

Simon Rogers simon-rogers at ntlworld.com
Wed Nov 7 12:30:22 PST 2007


I have two laptops with Intel 945GM gfx, both running CentOS 5. The Xorg 
log reports build ID xorg-x11-server 1.1.1-48.13.el5. Kernel 2.6.18-8. I 
also tested this on Ubuntu Gutsy, with the same result.

The problem: If I define a polygon stipple with horizontal or vertical, 
one pixel wide stripes, my test app runs at ~300FPS. If I change this 
stipple pattern to anything else, performance drops by a factor of 10.

I can provide test source code to demonstrate.

Apologies if this is the wrong forum.


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