Low speed at two Block Erupters (CGMiner) :(

[taxik]

Hello,

today arrived second USB Block Erupter, so i connected it to my Debian linux server. But its slower than mining with only one !
Here is output:

Code:

 cgminer version 3.3.4 - Started: [2013-08-26 14:22:38]
--------------------------------------------------------------------------------
 (5s):182.8M (avg):204.0Mh/s | A:38  R:0  HW:0  WU:2.8/m
 ST: 1  SS: 0  NB: 4  LW: 89  GF: 0  RF: 0
 Connected to stratum.bitcoin.cz diff 1 with stratum as user XXXXXXX
 Block: 0028d887a81b58f1...  Diff:65.8M  Started: [14:34:42]  Best share: 30
--------------------------------------------------------------------------------
 [P]ool management [S]ettings [D]isplay options [Q]uit
 AMU 0:                | 250.7M/122.6Mh/s | A:24 R:0 HW:0 WU:1.8/m
 AMU 1:                | 198.2M/81.40Mh/s | A:14 R:0 HW:0 WU:1.0/m
--------------------------------------------------------------------------------

 [2013-08-26 14:34:34] Accepted 5c5f7265 Diff 2/1 AMU 1
 [2013-08-26 14:34:42] Network diff set to 65.8M
 [2013-08-26 14:34:42] Stratum from pool 0 detected new block
 [2013-08-26 14:35:34] AMU0: TIMEOUT GetResults took 63648ms but was 100ms
 [2013-08-26 14:35:34] AMU1: TIMEOUT GetResults took 60000ms but was 100ms
 [2013-08-26 14:35:36] AMU1: TIMEOUT GetResults took 2490ms but was 100ms
 [2013-08-26 14:35:36] Accepted 199c20c7 Diff 9/1 AMU 1
 [2013-08-26 14:35:38] AMU0: TIMEOUT GetResults took 4164ms but was 100ms
 [2013-08-26 14:35:38] Accepted 1fae288c Diff 8/1 AMU 0
 [2013-08-26 14:35:49] AMU0: TIMEOUT GetResults took 11220ms but was 100ms
 [2013-08-26 14:35:49] Accepted c4524192 Diff 1/1 AMU 0

I tried it on Windows computer with BitMinter client and it works normally at speed of 655Mh/s

P.S. I am using powered USB HUB, because Windows computer can´t handle 2 Block Erupters

[1715161675]

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[1715161675]

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[-ck]

Upgrade to latest version of cgminer and reboot to make sure it uses the included DLL for the usb library. Older DLLs had this problem.

[taxik]

I upgraded to latest version. But nothing changed

Here output:

Code:

cgminer version 3.4.0 - Started: [2013-08-26 18:40:26]
--------------------------------------------------------------------------------
 (5s):169.0M (avg):160.9Mh/s | A:7  R:0  HW:0  WU:5.5/m
 ST: 2  SS: 0  NB: 1  LW: 20  GF: 0  RF: 0
 Connected to stratum.bitcoin.cz diff 1 with stratum as user taxik.worker1
 Block: 000171c1103307a5...  Diff:65.8M  Started: [18:40:26]  Best share: 20
--------------------------------------------------------------------------------
 [P]ool management [S]ettings [D]isplay options [Q]uit
 AMU 2:                | 228.8M/241.7Mh/s | A:4 R:0 HW:0 WU: 6.9/m
 AMU 3:                | 46.28M/43.38Mh/s | A:1 R:0 HW:0 WU: 1.7/m
--------------------------------------------------------------------------------

 [2013-08-26 18:41:08] Hotplug: Icarus added AMU 3
 [2013-08-26 18:41:12] AMU3: TIMEOUT GetResults took 4363ms but was 100ms
 [2013-08-26 18:41:12] Accepted eb127853 Diff 1/1 AMU 3
 [2013-08-26 18:41:14] AMU2: TIMEOUT GetResults took 5825ms but was 100ms
 [2013-08-26 18:41:14] Accepted d71b7535 Diff 1/1 AMU 2
 [2013-08-26 18:41:19] AMU2: TIMEOUT GetResults took 5716ms but was 100ms
 [2013-08-26 18:41:19] Accepted 6ea984cc Diff 2/1 AMU 2
 [2013-08-26 18:41:28] AMU2: TIMEOUT GetResults took 8750ms but was 100ms
 [2013-08-26 18:41:28] Accepted 4af2b887 Diff 3/1 AMU 2
 [2013-08-26 18:41:33] AMU2: TIMEOUT GetResults took 4578ms but was 100ms
 [2013-08-26 18:41:33] Accepted 0c3cdd45 Diff 20/1 AMU 2

[SirMintALot]

maybe its a bit underpowered? I had a similar problem when I connected two Block Erupters to a 5-port USB hub with cardreader that only has a 1000mA PSU.

[taxik]

maybe its a bit underpowered? I had a similar problem when I connected two Block Erupters to a 5-port USB hub with cardreader that only has a 1000mA PSU.

I think not, because Windows computer works fine with BitMinter client and powered hub, but here are specifiations of my hub:

Power supply 5 W

Input voltage 100 - 240 V

Output voltage 5 V

Input frequency 50 / 60 Hz

Output current 1 A
//definetely not. Now i tried with one Block Erupter connected to HUB and one connected directly to computer, and effect was same, so i am sure there isn´t problem with power

[-ck]

Make sure there isn't another libusb-1.0.dll somewhere on your system?

[taxik]

Make sure there isn't another libusb-1.0.dll somewhere on your system?

Aah maybe this was problem. I will check it

P.S. i installed CGMiner with this tutorial:

http://blog.phrog.org/2013/07/06/simple-debian-cgminer-asicminer-block-erupter-usb-setup/

//I uninstalled all packages via apt-get remove (including libusb.dll 1.00) but effect was same (i rebooted too)
Output was same, but here is output with hotplug:

Code:

 cgminer version 3.4.0 - Started: [2013-08-27 09:42:24]
--------------------------------------------------------------------------------
 (5s):61.40M (avg):61.54Mh/s | A:1  R:0  HW:0  WU:1.4/m
 ST: 2  SS: 0  NB: 1  LW: 6  GF: 0  RF: 0
 Connected to stratum.bitcoin.cz diff 1 with stratum as user taxik.worker1
 Block: 003b83e55adaf99b...  Diff:65.8M  Started: [09:42:24]  Best share: 1
--------------------------------------------------------------------------------
 [P]ool management [S]ettings [D]isplay options [Q]uit
 AMU 0:                | 64.99M/121.5Mh/s | A:1 R:0 HW:0 WU:2.8/m
 AMU 1:                |  0.000/ 0.000h/s | A:0 R:0 HW:0 WU:0.0/m
--------------------------------------------------------------------------------
 [2013-08-27 09:42:22] Started cgminer 3.4.0
 [2013-08-27 09:42:22] No devices detected!
 [2013-08-27 09:42:22] Waiting for USB hotplug devices or press q to quit
 [2013-08-27 09:42:22] Probing for an alive pool
 [2013-08-27 09:42:23] Switching pool 0 http://api.bitcoin.cz:8332 to stratum+tc
p://stratum.bitcoin.cz:3333
 [2013-08-27 09:42:24] Network diff set to 65.8M
 [2013-08-27 09:42:45] Hotplug: Icarus added AMU 0
 [2013-08-27 09:42:50] Hotplug: Icarus added AMU 1
 [2013-08-27 09:42:53] AMU0: TIMEOUT GetResults took 2479ms but was 100ms
 [2013-08-27 09:42:53] Accepted cfbbb3b6 Diff 1/1 AMU 0
 [2013-08-27 09:42:53] Stratum from pool 0 requested work restart

Pls guys help me, everyday i am loosing profit from second Block Erupter ((

[-ck]

Make sure there isn't another libusb-1.0.dll somewhere on your system?

Aah maybe this was problem. I will check it

P.S. i installed CGMiner with this tutorial:

http://blog.phrog.org/2013/07/06/simple-debian-cgminer-asicminer-block-erupter-usb-setup/

//I uninstalled all packages via apt-get remove (including libusb.dll 1.00) but effect was same (i rebooted too)

Ah wait you're on linux? Here I was talking DLLs

Grab Kano's binary which has the other libusb built in statically. The problem is the old libusb is broken on both linux and windows.
Here. I even went to the trouble of finding the relevant post:
https://bitcointalk.org/index.php?topic=28402.msg2983720#msg2983720

[HellDiverUK]

maybe its a bit underpowered? I had a similar problem when I connected two Block Erupters to a 5-port USB hub with cardreader that only has a 1000mA PSU.

I think not,

Output voltage 5 V

Output current 1 A

500mA + 500mA = 1A.  Not counting the hub's overhead, so your hub's PSU is underpowered.

[taxik]

500mA + 500mA = 1A.  Not counting the hub's overhead, so your hub's PSU is underpowered.

//definetely not. Now i tried with one Block Erupter connected to HUB and one connected directly to computer, and effect was same, so i am sure there isn´t problem with power

Sry i am little noob at linux. There isn´t download for Debian. And i don´t know what to do with *.a file

[-ck]

500mA + 500mA = 1A.  Not counting the hub's overhead, so your hub's PSU is underpowered.

//definetely not. Now i tried with one Block Erupter connected to HUB and one connected directly to computer, and effect was same, so i am sure there isn´t problem with power

Sry i am little noob at linux. There isn´t download for Debian. And i don´t know what to do with *.a file

Try the ubuntu binary

[taxik]

as i said, i don´t know how to compile it/use it ( I don´t know what i need to do with *.a file. Can you send me tutorial for it?

[HellDiverUK]

500mA + 500mA = 1A.  Not counting the hub's overhead, so your hub's PSU is underpowered.

//definetely not. Now i tried with one Block Erupter connected to HUB and one connected directly to computer, and effect was same, so i am sure there isn´t problem with power

I'm sure it is, but hey, whatever.  Knock yourself out chasing your tail.

[Winterfrost]

as i said, i don´t know how to compile it/use it ( I don´t know what i need to do with *.a file. Can you send me tutorial for it?

It's actually a binary file, the "a" is just part of the version number. No compiling necessary. Open a terminal and type in these two commands:

Code:

wget https://github.com/kanoi/cgminer-binaries/raw/master/Ubuntu_11.04_x86_64/cgminer-3.4.0a
chmod +x cgminer-3.4.0a

Then run cgminer like you normally do (you can even rename 'cgminer-3.4.0a' to just plain 'cgminer').

[taxik]

not working for me it says:


-bash: ./cgminer: binary file cannot be executed

i replace old cgminer file (

[SirMintALot]

500mA + 500mA = 1A.  Not counting the hub's overhead, so your hub's PSU is underpowered.

//definetely not. Now i tried with one Block Erupter connected to HUB and one connected directly to computer, and effect was same, so i am sure there isn´t problem with power

I'm sure it is, but hey, whatever.  Knock yourself out chasing your tail.

Indeed, a Block Erupter needs 505 - 510 mA, a USB 2.0 Port only delivers 500mA, so this cant work from a USB 2.0 port directly. You can either plug them into USB 3.0 ports (which deliver 1000mA per port) or use an USB hub with enough power.

[taxik]

But why one Block Erupter works (connected DIRECTLY to computer-USB2.0) fine on 336MH/s and second, connected on powered HUB doesn´t work?

//btw my last message was:

not working for me it says:


-bash: ./cgminer: binary file cannot be executed

i replace old cgminer file

[SirMintALot]

But why one Block Erupter works (connected DIRECTLY to computer-USB2.0) fine on 336MH/s and second, connected on powered HUB doesn´t work?

They might work with not enough curent, but the they are runnng slower thann 336 MH/s. Maybe somethings there is wrong with your hub?

//btw my last message was:

not working for me it says:


-bash: ./cgminer: binary file cannot be executed

i replace old cgminer file

change rights with chmod. start bash and then go to the directory that contains cgminer. Then do

Code:

sudo chmod 777 ./cgminer

(lower right might do as well, but 777 is easy to remind)

[-ck]

Maybe he's running 32 bit debian. That binary is for 64bit ubuntu...

[taxik]

Guys i installed BFGMiner and it doesn´t say nothing about timeouts and speed is 600Mh/s. But still i want solve that problem with CGMiner. So what binary i need?