On my computer TF2 hang the entire systemt and the ingame sound loops. It
happens after few minutes of playing the game.

AMD FX 4300
ASUS M5A78L-M
AMD Radeon HD 7850 2 GB OC
MESA 11.1.0
Arch Linux 64-bit distro fully updated as of today.
LLVM 3.7.0-6

When the game hangs, i must restart the system.