7850 Stability issues after switching OS

[snowcrashed]

I have a Sapphire 7850 which was being used for mining LTC.  I was using BAMT and the card mined @ 350kh/s for days on end with no issues.  I changed the rig's OS from BAMT to Xubuntu.  I tried running CGMiner with the same settings/drivers as I was using in BAMT but the system resets after 15-20 minutes of mining. I am using the following settings: I=19, TC=8192, gpu-engine=1100, gpu-memclock=1350.  After experimenting a bit, I found the card will run stable in Xubuntu if the intensity is at 17 or lower, but this is a loss of at least 100kh/s compared to what I had been getting.  Cgminer reports a temperature of 67C and HW:0.

Why would I have stability issues in Xubuntu with higher intensity setting but BAMT runs fine?  What could be causing this?  Thanks.

[Someminir]

Hi,
I've got the same card but it doesn't work on BAMT. (Getting HW's)
Would you mind posting your BAMT conf and Cgminer version?
Thanks, Minir.

P.s you might need to (re)fine-tune your settings for Xubuntu it works differently from BAMT. (I think.)