Having a strange issue with cgminer 3.7.2 the last few days. Was out of town so no time to investigate till now and im at a loss
This is my desktop which has been having issues. ( I mine overnight and at low intensity during the day with it )
Specs:
Desktop:
Phenom 2 x6 1090t
Asus m4a89td pro usb3 Motherboard
8Gb ddr3 1600 memory
2x Sapphire 6950 in the pci-e 16x slots
750w corsair modular psu
OS: Windows 7 Ultimate 64 Bit Up to date
Miner:
Sempron CPU unlocked to Dual core. Mining SRC using qrk miner
2Gb DDR3 1600 Mem
2x 6950 1x 7850
900w Antec PSU
Windows 7 ultimate 64 Bit Up to date
Mining:
Solo mining bottlecaps. Wallet located on miner on local network Also windows 7 (wireless connection)
Desktop upstairs (wireless connection)
Conf File:
daemon=1
server=1
rpcuser=x
rpcpassword=xx
rpcport=9862
rpcallowip=10.0.0.33 (Desktop)
rpcallowip=127.0.0.1
Issue:
I can suddenly only get one miner to connect at a time. While I was away I had been using guiminer as it's much easier to switch pools remotely from my phone.
I noticed that one morning my hashrate had dropped by about 450kh and signed on to see one of my cards displaying "Connection Problems" So I obviously restarted the worker.
Only for it to report it could not connect to any pool. So I verified all the settings were correct, Even cloned the one that was working and selected the correct gpu. Nothing. Stopping one worker will allow the other to run but only 1 at a time.
2013-11-19 20:32:07: Running command: "C:\Users\Miner 3\Desktop\guiminer\cgminer\cgminer.exe" --scrypt -u x -p xx -o http://10.0.0.209:9862 --gpu-platform 0 -d 0 -w 256 -v 1 -I 18 -g 1 -l 1 -T -s 1 --thread-concurrency 8000
2013-11-19 20:32:07: Listener for "Default" started
2013-11-19 20:32:10: Listener for "Default": [2013-11-19 20:32:07] Started cgminer 3.1.0
2013-11-19 20:32:10: Listener for "Default": [2013-11-19 20:32:08] Probing for an alive pool
2013-11-19 20:32:10: Listener for "Default": [2013-11-19 20:32:08] Network diff set to 14K
2013-11-19 20:32:10: Listener for "Default": [2013-11-19 20:32:08] No suitable long-poll found for http://10.0.0.209:9862
2013-11-19 20:32:14: Listener for "Default": [2013-11-19 20:32:14] Network diff set to 14K
2013-11-19 20:32:14: Listener for "Default": [2013-11-19 20:32:14] New block detected on network
2013-11-19 20:32:15: Running command: "C:\Users\Miner 3\Desktop\guiminer\cgminer\cgminer.exe" --scrypt -u x -p xx -o http://10.0.0.209:9862 --gpu-platform 0 -d 1 -w 256 -v 1 -I 15 -g 1 -l 1 -T -s 1 --thread-concurrency 8000
2013-11-19 20:32:15: Listener for "2" started
2013-11-19 20:32:49: Listener for "Default": [2013-11-19 20:32:48] Network diff set to 14K
2013-11-19 20:32:49: Listener for "Default": [2013-11-19 20:32:48] New block detected on network
2013-11-19 20:32:55: Listener for "Default": [2013-11-19 20:32:54] Network diff set to 14K
2013-11-19 20:32:55: Listener for "Default": [2013-11-19 20:32:54] New block detected on network
2013-11-19 20:33:09: Listener for "Default": [2013-11-19 20:33:08] Network diff set to 14K
2013-11-19 20:33:09: Listener for "Default": [2013-11-19 20:33:08] New block detected on network
2013-11-19 20:33:12: Listener for "Default": [2013-11-19 20:33:11] Network diff set to 14K
2013-11-19 20:33:12: Listener for "Default": [2013-11-19 20:33:11] New block detected on network
2013-11-19 20:33:16: Listener for "2": [2013-11-19 20:32:15] Started cgminer 3.1.0
2013-11-19 20:33:16: Listener for "2": [2013-11-19 20:32:16] Probing for an alive pool
2013-11-19 20:33:16: Listener for "2": [2013-11-19 20:33:16] No servers were found that could be used to get work from.
2013-11-19 20:33:16: Listener for "2": [2013-11-19 20:33:16] Please check the details from the list below of the servers you have input
2013-11-19 20:33:16: Listener for "2": [2013-11-19 20:33:16] Most likely you have input the wrong URL, forgotten to add a port, or have not set up workers
2013-11-19 20:33:16: Listener for "2": [2013-11-19 20:33:16] Pool: 0 URL: http://10.0.0.209:9862 User: x Password: xx
2013-11-19 20:33:16: Listener for "2": [2013-11-19 20:33:16] No servers could be used! Exiting.
2013-11-19 20:33:18: Listener for "Default": [2013-11-19 20:33:17] Network diff set to 14K
2013-11-19 20:33:18: Listener for "Default": [2013-11-19 20:33:17] New block detected on network
2013-11-19 20:33:28: Listener for "Default": [2013-11-19 20:33:27] Network diff set to 14K
2013-11-19 20:33:28: Listener for "Default": [2013-11-19 20:33:27] New block detected on network
Gave up on guiminer and went to old faithful cgminer
cgminer.exe --scrypt -u x -p xx -o http://10.0.0.209:9862 --gpu-platform 0 -d 0 -d 1 -w 256 -v 1 -I 18 -g 1 -l 1 -T -s 1 --thread-concurrency 8000
^^Reports correct hashrate but WU slowly drops and after about 30 minutes it slowly drops out and says it cannot connect. Never finding a block when it should on average find 2 in that time frame. ( Meanwhile the miner downstairs is cranking out blocks left and right)
Running separate instances reports the same issue as guiminer where the second on will never connect.
More Info:
I have the top card overclocked as the bottom causes the other to overheat Separate hasrates are reported so it is seeing and using both cards fine. Just not at the same time
I overclock via MSI afterburner as I use it for gaming as well
Card 1 Stock 800 Core 1250 MEM ~400Kh 77° In bottom slot
Card 2 OCed 900Core 1350 MEM ~475Kh 82° On top
I am running 3 monitors (No eyefinity) 1 DVI in each card and HDMI in the bottom
Tried with no apps running
Re installed latest drivers
Tried removing Crossfire bridge ( Crossfire is disabled via CCC)
Resource usage during mining CGminer sticks at 25% cpu usage spread across all cores
6.29 Gb available ram ( 51,312 used by cgminer )
90%+ free disk space
Ports forwared to 10.0.0.209 using custom RPC port via .conf file. ( Miner housing the wallet is also Windows 7 )
Originally had wallet located on desktop but moved to miner while trouble shooting. No better
Anyone ever encountered this? Im at a loss here 
Thanks for the help. A nice tip could be in store for anyone with a solution 
I would like to stick with windows as my main OS but will move to Ubuntu if no solution is found ( Currently dual boot )
