Does anyone have a list of coins where soloing is known to be broken? Maybe one with low diff? 
Phoenixcoin has low diff and the blockchain should download fairly quick for the wallet.I find blocks in a matter of mins. after starting r54, r55 & r56 gives more boooo's than r54 that I get none in.
-i value needs to be low -i 10 is a good starting point for solo mining phoenixcoin.
at 300+ kh/s I find a block in about every 15 mins most of the time on a single GTX960.
r68 dump log
Code:
[2015-09-23 02:44:50] NVAPI GPU monitoring enabled.[0m
[2015-09-23 02:44:50] 1 miner thread started, using 'neoscrypt' algorithm.[0m
[2015-09-23 02:44:50] [01;30mBinding thread 0 to cpu 0 (mask 1)[0m
[2015-09-23 02:44:50] [01;30mJSON protocol request:
{"method": "getwork", "params": [], "id":0}
[0m
* Rebuilt URL to: http://127.0.0.1:3333/
* Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to 127.0.0.1 (127.0.0.1) port 3333 (#0)
* Server auth using Basic with user 'phoenixcoinpc'
> POST / HTTP/1.1
Authorization: Basic cGhvZW5peGNvaW5wYzp4
Host: 127.0.0.1:3333
Accept-Encoding: identity
Content-Type: application/json
Content-Length: 45
User-Agent: ccminer/1.5.67-git(SP-MOD)
X-Mining-Extensions: longpoll noncerange reject-reason
X-Mining-Hashrate: 0
< HTTP/1.1 200 OK
< Date: Wed, 23 Sep 2015 07:44:50 +0000
< Connection: keep-alive
< Content-Length: 311
< Content-Type: application/json
< Server: phoenixcoin-json-rpc/v0.6.6.0
<
* Connection #0 to host 127.0.0.1 left intact
[2015-09-23 02:44:50] [01;30mJSON protocol response:
{
"error": null,
"result": {
"algorithm": "neoscrypt",
"data": "02000000e2f3ceab75f7db954acf51383b48743fea1faa9f0216239bcc864ff0f1c66a0a221a2f1c9f713cd60c3d9cc41aa5fc9c5e52c37405c96a017a19442d5158802f6c580256549e071d000000003d010000",
"target": "0000000000000000000000000000000000000000000000000000549e07000000"
},
"id": 0
}
[0m
[2015-09-23 02:44:50] [31mJSON inval data[0m
[2015-09-23 02:44:50] [31mjson_rpc_call failed, retry after 30 seconds[0m
[2015-09-23 02:44:50] 1 miner thread started, using 'neoscrypt' algorithm.[0m
[2015-09-23 02:44:50] [01;30mBinding thread 0 to cpu 0 (mask 1)[0m
[2015-09-23 02:44:50] [01;30mJSON protocol request:
{"method": "getwork", "params": [], "id":0}
[0m
* Rebuilt URL to: http://127.0.0.1:3333/
* Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to 127.0.0.1 (127.0.0.1) port 3333 (#0)
* Server auth using Basic with user 'phoenixcoinpc'
> POST / HTTP/1.1
Authorization: Basic cGhvZW5peGNvaW5wYzp4
Host: 127.0.0.1:3333
Accept-Encoding: identity
Content-Type: application/json
Content-Length: 45
User-Agent: ccminer/1.5.67-git(SP-MOD)
X-Mining-Extensions: longpoll noncerange reject-reason
X-Mining-Hashrate: 0
< HTTP/1.1 200 OK
< Date: Wed, 23 Sep 2015 07:44:50 +0000
< Connection: keep-alive
< Content-Length: 311
< Content-Type: application/json
< Server: phoenixcoin-json-rpc/v0.6.6.0
<
* Connection #0 to host 127.0.0.1 left intact
[2015-09-23 02:44:50] [01;30mJSON protocol response:
{
"error": null,
"result": {
"algorithm": "neoscrypt",
"data": "02000000e2f3ceab75f7db954acf51383b48743fea1faa9f0216239bcc864ff0f1c66a0a221a2f1c9f713cd60c3d9cc41aa5fc9c5e52c37405c96a017a19442d5158802f6c580256549e071d000000003d010000",
"target": "0000000000000000000000000000000000000000000000000000549e07000000"
},
"id": 0
}
[0m
[2015-09-23 02:44:50] [31mJSON inval data[0m
[2015-09-23 02:44:50] [31mjson_rpc_call failed, retry after 30 seconds[0m
r54 dump log:
-- SNIP --
Thanks. Looks like neoscrypt has a 168byte data size? We're passing 128 to that hack hex2bin() function, so it fails.