Comment # 124 on bug 81644 from José Suárez

Just for an easier read:

Radeon HD 7870 GHZ Edition 2 GB
FX 8150 @ 3700 MHz
16 GB RAM

Linux 3.17-rc5, with mesa 10.4~git1409200730.4eb2bb compiled with llvm
3.6~svn217413 on Kubuntu 14.04 with all the latest updates (including firefox).