Hi,

I am playing Civilization 5 (the native port) on Ubuntu 15.10 with a Radeon
HD4870 and the default drivers shipped with Ubuntu (Mesa 11.0.2).

Everything works fine with the exception of a screen used for diplomatic
interactions which shows a nation leader. That nation leader appears completely
black and at the same time, the FPS drops a lot. Here is an example:
http://i.imgur.com/ma66qyT.jpg

I ran the game with LIBGL_ALWAYS_SOFTWARE set and tested with a random nation
leader. He was rendered correctly.