I have downloaded geth and ethminer, and started running a testnet with 2 nodes - 1 mining and the other not. Here's my (noobish) problems:
If I submit a txn to my non-mining node, it won't get processed by the mining node even though both nodes are peers. Does it mean that only txns that are submitted to a mining node will be propagated to other mining nodes and get settled?
I tried to hook up my ethminer (1.4.x) to one of the nodes and perform gpu mining, but it either crashes my nvidia card (with 2MB mem) or just mine with 0 H/s. thoughout the trial the node seemed to recognize that something is trying to mine for it (eth.mining == true and it says the next block is committed to be mined). Why does the ethminer instance keep producing 0 hashrate (I am actually ignoring the gpu crashing issue since it gets 0 H/s even with cpu mining)?