I used 4x1060 6GB, and ethminer on Linux 16 and overlock GPUs When i start script everythings works ok, but after some hours, everything look ok, I receive new jobs but my miner to making "Submitted and accepted."
I already switch internet from wifi to cable, and same situation.
I think it can be 3 possible problems
Internet Provider (uploading issues)(i test internet speed and it was fast)
Linux GPU drivers (possible)
Pool(I had others machines, and they are working ok with same pool)
smbd can advice how to find that problem.