anyone who has experience running ubuntu?
Recently had to use an older computer for my cards, running ubuntu 12.10 32bit with 2gb ram and cgminer 3.5.0, using the latest drivers from amd. I have a 6950 and a 6970 but only getting around 500 kh/s with both cards combined, compared to 900-1000 I had when running on a win 7 64bit 8gb ram computer (also 3.5.0).
I don't have any special settings, just the pool information and an intensity of 19, no hardware errors, GPU_MAX_ALLOC_PERCENT 100
and GPU_USE_SYNC_OBJECTS 1 has been set.
export DISPLAY=:0
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
Make sure your running those commands before every cgminer starts
May want to look into setting your thread concurrency on each card to see if that helps
Some settings here -
https://litecoin.info/Mining_hardware_comparison#AMD_.28ATI.29Help with undervolting -
http://www.cryptobadger.com/2013/10/undervolting-in-linux-via-modified-bios/Good thread to help get you running -
www.reddit.com/r/litecoinmining/comments/1fb5qs/step_by_step_headless_linux_setup_from_scratch/