Problems
1) Tried to mine with only CPU, it always complain no mining threads even with -t 2 specified (ie: cant mine with only CPU).
2) Mining with -cd 0 1 2 -t 1, 3 GPUs mining but all 4 threads of i5 are mining
I was about to post a similar question, but I can't get CPU mining to work at all.
I tried on a 6700K with a pair of GPUs but no CPU threads were started either by default or with -t 6.
GPUs working fine.