So I was watching Youtube when the screen suddenly stopped. The sound worked, I moved the mouse around. The sound cut out, the screen went black. This also happens in some of my other thing I do, like playing Dota 2. I'll be loading up my game, when suddenly it goes to black, and then goes back to the desktop, this time with the game NOT open. I checked my temps, k10temp-pci-00c3 gets +0.0C, radeon-pci-0100 gets +29.0C.
AMD Anthlon x4 3.8ghz quad core
16 GiB RAM
Powercolor PCS+ Radeon R9 270x (GPU)
Seagate 1tb HDD
edit: Dota 2 problem solved. Reset the advanced settings to defaults and then turned off high quality water for maximum FPS.
The problem doesn't frustrate me, just annoys me.