I recently upgraded to Xubuntu 16.04 and would like to install the AMDGPU Pro driver. The first time installing the driver, my secondary DVI monitor did not receive signal. The second attempt, not only did my secondary monitor not work, but one thread of my CPU got pegged to 100% and I experienced a massive system slowdown. My graphics card is an MSI Lightning R9 290X. Any help getting the driver working would be greatly appreciated.