Hello Matt, Timothy, Michel, Andrey, and Dan,

I have been testing some older cards (FirePro 2270, Embedded Radeon
E6465) on a Power8 system with no problems of the type you're
describing; I've run the Piglit test suite and the Khronos OpenGL
Conformance Test Suite.

Direct access to a Talos machine could be beneficial, OR perhaps one
of you (Timothy, Michel, Andrey) could send me a WX 7100 for testing;
I've been meaning to ask for one of these anyway for a while now.

Just out of curiosity, what (other) differences in behavior do you see
between PPC64LE systems configured for 64K pages and systems
configured for 4K pages?