Trying to benchmark, computer restarts, Ubuntu 14.04

I first installed Ubuntu Server 14.04, I installed the default driver from Ubuntu repository, then i installed OpenCL libraries, when i tried to benchmark with "./oclHashcat64.bin -b" it said that i need to reed the wiki for the right version for AMD drivers, after i found the right version I installed the dependencies, I installed the driver that i downloaded from "http://geeko.ioda.net/mirror/amd-fglrx/raw-src/" because I couldn't find it in AMD official webiste.

Quote:Now when i run "fglrxinfo" i have these results

display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 1
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 2
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 3
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 4
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 5
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 6
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

display: :0 screen: 7
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7900 Series
OpenGL version string: 4.4.13084 Compatibility Profile Context 14.301.1001

It seems like i have the right version now, but when i run "./oclHashcat64.bin -b" to see the benchmark it restarts right after i press enter!

I would like to know if someone had the same problem, and how did they fix it if possible?

The first thing that comes to my mind is the newer version from ubuntu might have not uninstalled completely! But i am not sure what would cause this restart.

I am searching and reading about this issue, but didn't find any info yet, if i find a solution, i'll post it here, hopefully someone will reply before i loose too much time searching

Thank you in advance.