CGMiner crashes with more than 6 AntMiner U1 in USB hub.

[stevenf]

Hi Everyone,

Got a problem with my USB AntMiners, I can only get up to a max of 6 USB miners in my USB hub (TeckNet 10 port) working. When I place number 7, CGMiner crashes

This is the commandline I use:
cgminer --bmsc-options 115200:20 -o stratum+tcp://stratum.bitcoin.cz:3333 -u stevenf.worker1 -p 123 --bmsc-freq 0781

When I start CGMiner with 6 miner all is ok. I get this output:
===============================================================
----------------------------------------------------------------------
 [P]ool management [ S ]ettings [D]isplay options [Q]uit
 AMU 0:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 1:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 2:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 3:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 4:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 5:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
----------------------------------------------------------------------

 [2014-01-02 19:41:30] Send frequency 82078106
 [2014-01-02 19:41:30] Send freq getstatus 84000400
 [2014-01-02 19:41:32] Recv 1 freq getstatus=800f00011d
 [2014-01-02 19:41:32] --------recv freq getstatus ok finish---------
 [2014-01-02 19:41:33] -----------------start nonce------------------
 [2014-01-02 19:41:33] Bmsc send golden nonce
 [2014-01-02 19:41:33] -----------------start freq-------------------
 [2014-01-02 19:41:34] Send frequency 82078106
 [2014-01-02 19:41:34] Send freq getstatus 84000400
 [2014-01-02 19:41:36] Recv 1 freq getstatus=800f00011d

 ================< CUT>

 [2014-01-02 19:41:49] Send frequency 82078106
 [2014-01-02 19:41:49] Send freq getstatus 84000400
 [2014-01-02 19:41:51] Recv 1 freq getstatus=800f00011d
 [2014-01-02 19:41:51] --------recv freq getstatus ok finish---------
 [2014-01-02 19:41:52] -----------------start nonce------------------
 [2014-01-02 19:41:52] Bmsc send golden nonce
 [2014-01-02 19:41:52] Probing for an alive pool
 [2014-01-02 19:41:53] Pool 0 difficulty changed to 3
 [2014-01-02 19:41:53] Network diff set to 1.42G
===============================================================

When I put number 7 in, it goes through the initialise process as above, and then CGMiner crashes.

I'm using Windows 7, also tried on Windows XP same problem.
The power to the USB hub should be fine, got a 650W ATX PSU with 24A on the rail.

Any idea's?

[Spagabob]

Do they always report  all zeros as the hash rate?

Also, at the end of your bat file break to a new line and put the word PAUSE at the end, so you can see if it spits an error message.

cgminer.exe -o blablablabla stuff -o blablabla -gpu-memclock >9000
PAUSE

Oh, you may want to increase the size of your windows buffer (applies to Windows). I think I remember reading that the window has issues displaying a lot of devices. I had to do this to get more than 10 BE to show in the same window. Changing the windows size it's self may help too.
Right click the SHORTCUT to the bat file. Click properties and go to the layout tab. Change the screen buffer size to a few hundred more. Restart and see if that helps.
http://imgur.com/p55uDrJ
Example of options. Numbers are exaggerated.

I can't seem to find out how to get to the options besides right clicking the shortcut to the bat file. The options don't appear in the properties of cgminer or the .bat itself. I'm sure there's a quicker way.

Also, the usb hub is giving power to the sticks, not your computers psu. These pull a bit more than block erupters do. You may be pulling more power than they can support. What Amperage does your usb hubs run at? 

[bgibso01]

Hi Everyone,

Got a problem with my USB AntMiners, I can only get up to a max of 6 USB miners in my USB hub (TeckNet 10 port) working. When I place number 7, CGMiner crashes

This is the commandline I use:
cgminer --bmsc-options 115200:20 -o stratum+tcp://stratum.bitcoin.cz:3333 -u stevenf.worker1 -p 123 --bmsc-freq 0781

When I start CGMiner with 6 miner all is ok. I get this output:
===============================================================
----------------------------------------------------------------------
 [P]ool management [ S ]ettings [D]isplay options [Q]uit
 AMU 0:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 1:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 2:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 3:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 4:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
 AMU 5:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
----------------------------------------------------------------------

 [2014-01-02 19:41:30] Send frequency 82078106
 [2014-01-02 19:41:30] Send freq getstatus 84000400
 [2014-01-02 19:41:32] Recv 1 freq getstatus=800f00011d
 [2014-01-02 19:41:32] --------recv freq getstatus ok finish---------
 [2014-01-02 19:41:33] -----------------start nonce------------------
 [2014-01-02 19:41:33] Bmsc send golden nonce
 [2014-01-02 19:41:33] -----------------start freq-------------------
 [2014-01-02 19:41:34] Send frequency 82078106
 [2014-01-02 19:41:34] Send freq getstatus 84000400
 [2014-01-02 19:41:36] Recv 1 freq getstatus=800f00011d

 ================< CUT>

 [2014-01-02 19:41:49] Send frequency 82078106
 [2014-01-02 19:41:49] Send freq getstatus 84000400
 [2014-01-02 19:41:51] Recv 1 freq getstatus=800f00011d
 [2014-01-02 19:41:51] --------recv freq getstatus ok finish---------
 [2014-01-02 19:41:52] -----------------start nonce------------------
 [2014-01-02 19:41:52] Bmsc send golden nonce
 [2014-01-02 19:41:52] Probing for an alive pool
 [2014-01-02 19:41:53] Pool 0 difficulty changed to 3
 [2014-01-02 19:41:53] Network diff set to 1.42G
===============================================================

When I put number 7 in, it goes through the initialise process as above, and then CGMiner crashes.

I'm using Windows 7, also tried on Windows XP same problem.
The power to the USB hub should be fine, got a 650W ATX PSU with 24A on the rail.

Any idea's?

You get further than I do.  I can start it up with one Antminer, but if I try to start with more than one I get to the Bmsc send golden nonce and then windows explorer quits working, shutting down the window.  After I have one going, I can add as many as I want though.  Currently I have 10 in one hub and 8 in another.  I think you are probably dealing with a power issue with your hub.  Check to see that you have a 12V4a power supply for your hub.

[stevenf]

You get further than I do.  I can start it up with one Antminer, but if I try to start with more than one I get to the Bmsc send golden nonce and then windows explorer quits working, shutting down the window.  After I have one going, I can add as many as I want though.  Currently I have 10 in one hub and 8 in another.  I think you are probably dealing with a power issue with your hub.  Check to see that you have a 12V4a power supply for your hub.

Not sure what the problem was, I tried on a different computer (Windows 7) and all went fine.

[ImCrazyOne]

I have exact same problem, I can only start cgminer when i have one antminer u1 connected. Then i just keep adding them to the usb hub, but i cant run cgminer with all 9 miners connected. I alsways have to start only one connected. How can i fix this issue?

[mainichi]

I have exact same problem, I can only start cgminer when i have one antminer u1 connected. Then i just keep adding them to the usb hub, but i cant run cgminer with all 9 miners connected. I alsways have to start only one connected. How can i fix this issue?

I've got the same problem, and I leave one U1 connected to the PC all the time, then start cgminer.  When the first U1 gets up to speed I plug in the USB hub with all the other U1's and wait for them all to be auto detected.
Its a work around and not a solution, but it saves plugging them in one by one.
Hopefully the software will be updated soon.

[ImCrazyOne]

I have the same issue with 9 antminers. I have to start with one u1 antminer connected and then add additional one by one. Anyone know a fix to this issue?

[kokojie]

I have the same issue, anyone figure out a solution yet?

[kokojie]

I have the same issue, anyone figure out a solution yet?

ok I resolved this problem by using bfgminer instead.

[Eternity]

Where did you buy the antminers ?

[Banin]

I have the same issue with 9 antminers. I have to start with one u1 antminer connected and then add additional one by one. Anyone know a fix to this issue?

Exactly same problem that i got