I have X555DG ASUS laptop and i have ubuntu 14.04 installed in it. When i installed the amd driver and rebooted, it told me that i'm using R6 graphics like i want. But when i rebooted again, it showed that i'm using the integrated vga ( R5 M330 ). And Catalyst showed i'm using R5 in OpenGL Renderer. How can i bring back my R6 dedicated graphics? i have tried set the setting to "Maximize performance" but no luck. Thanks!