Linux Headless Issues

Hi All,

I am having issues with a box running headless, as soon as I unplug the monitor the speed drops drastically, I am guessing this is an OS problem more than an oclHashcat problem?

Running driver:
[ 1.895598] [fglrx] module loaded - fglrx 14.30.4 [Sep 15 2014] with 3 minors
installed from: amd-catalyst-14-9-linux-x86-x86-64.zip

Monitor Plugged In:
$ ./oclHashcat64.bin -b -m 1000
oclHashcat v1.36 starting in benchmark-mode...

Device #1: Hawaii, 3072MB, 1000Mhz, 44MCU
Device #2: Cayman, 2012MB, 800Mhz, 24MCU
Device #3: Hawaii, 3072MB, 1000Mhz, 44MCU

Hashtype: NTLM
Workload: 1024 loops, 256 accel

Speed.GPU.#1.: 22088.6 MH/s
Speed.GPU.#2.: 9769.7 MH/s
Speed.GPU.#3.: 22056.4 MH/s
Speed.GPU.#*.: 53914.7 MH/s

Started: Tue May 12 14:31:41 2015
Stopped: Tue May 12 14:31:58 2015

Monitor Unplugged:
$ ./oclHashcat64.bin -b -m 1000
oclHashcat v1.36 starting in benchmark-mode...

Device #1: Hawaii, 3072MB, 1000Mhz, 44MCU
Device #2: Hawaii, 3072MB, 1000Mhz, 44MCU
Device #3: Hawaii, 3072MB, 1000Mhz, 44MCU

Hashtype: NTLM
Workload: 1024 loops, 256 accel

Speed.GPU.#1.: 7680.8 MH/s
Speed.GPU.#2.: 7600.8 MH/s
Speed.GPU.#3.: 7640.4 MH/s
Speed.GPU.#*.: 22922.1 MH/s

Started: Tue May 12 14:38:00 2015
Stopped: Tue May 12 14:38:16 2015

Any help would be appreciated.

Cheers,