Hello,
I am having a problem to run cpuminer-multi for cryptonight mining on Ubuntu 16, below is an example of the error I am getting. I tried Monero / BCN pools but no one work, same issue. (JSON invalid result, rpc2_login_decode: fail)
#./cpuminer -a cryptonight -o stratum+tcp://pool.democats.org:45500 -u xxxxxxxxxxxxxxxxxx -p x
** cpuminer-multi 1.3.3 by tpruvot@github **
BTC donation address: 1FhDPLPpw18X4srecguG3MxJYe4a1JsZnd (tpruvot)
[2017-06-21 06:40:08] Using JSON-RPC 2.0
[2017-06-21 06:40:08] CPU Supports AES-NI: YES
[2017-06-21 06:40:08] Starting Stratum on stratum+tcp://pool.democats.org:45500
[2017-06-21 06:40:08] 1 miner threads started, using 'cryptonight' algorithm.
[2017-06-21 06:40:08] JSON invalid result
[2017-06-21 06:40:08] rpc2_login_decode: fail
[2017-06-21 06:55:09] Stratum connection timeout
[2017-06-21 06:55:09] Stratum connection interrupted
[2017-06-21 06:55:09] JSON invalid result
[2017-06-21 06:55:09] rpc2_login_decode: fail