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.
I do not have a lot of experience, but I believe (with scrypt) you need to have at least as much system ram as gpu ram.
I thought so too, but I read a lot of posts and guides that stated 2 gb was fine if you ran ubuntu, even when using three cards.
I might be horribly wrong though, anyone that could confirm?