This week I incurred in an issue of glLineStipple implementation of ATI's OpenGL and the graphic chipset installed in my laptop computer, powered by an ATI Mobility Radeon HD 3470.

Sony doesn't let ATI release newer driver updates for such graphic board, used also with other notebooks on the market since 2009, so I have to keep driver 8.583.2.2000 released on 5/14/2009, although ATI reached release 11.12 for its drivers' collection and its ATI Catalyst manager.

I gave a chance also to Mod Cat - Ati Mobility Modder, which a modder that claims to jailbreak the ATI setup (formerly AMD), in order to install newer drivers and bypass the Catalyst pass check, but I wasn't able to succeed.

The latter 8 megabytes of machine code inside the DLL contain support for a more extensive list of graphic chipset, and even a workaround to circumvent the bug I can't fix.

At now when you draw lines or polygons using the glLineStipple mode, with some polygons overlapping other triangles, the ATI implementation doesn't throw any exception, but it hangs, taking about 100 or 1,000 times the standard rendering time. You can accept such performance decrease, so that I'm going to exclude such OpenGL feature, available since the first releases of the most cross-platform 3D library.