When I run ethminer -G it starts the miner as expected. It takes around 60 seconds to allocate the DAG, and then it starts pumping out hashes on the GPU (at a dismal 1MH/s but that's besides the point.)
cl 09:49:13|cl-0 DAG 93 %
cl 09:49:13|cl-0 Switch time 52536 ms / 49530777 us
m 09:49:13|main Speed 0.00 Mh/s gpu/0 0.00 [A0+0:R0+0:F0] Time: 00:00
m 09:49:14|main Speed 1.04 Mh/s gpu/0 1.04 [A0+0:R0+0:F0] Time: 00:00
m 09:49:14|main Speed 1.04 Mh/s gpu/0 1.04 [A0+0:R0+0:F0] Time: 00:00
However, when I attempt to connect to a pool, for example ethminer -F http://eth1.nanopool.org:8888/0xddb296fbb8882e35e500747bf684f63687437431 -G then it sputters with
X 09:52:39|cl-0 Creating DAG buffer failed: clCreateBuffer -61
X 09:52:39|cl-0 OpenCL Error: clEnqueueWriteBuffer -38
If it wasn't working with just the -G I would understand it and have some debugging to do. But I fail to see why having the payload come from a pool instead of locally would cause it to fail so.
I notice the buffer sizes are different – on the non-pool version, I get cl 09:48:27|cl-0 Creating DAG buffer, size 1073739904 but on the pool version I get cl 09:52:39|cl-0 Creating DAG buffer, size 2298476672 so this is likely the cause of the problem – but I still don't see why it exists.
If I try a different pool will that change things? What options do I have?
Best Answer
first check your mining pool info update, then check updates on your miner software