<p>Does anyone else have this problem?  I have to restart that computer and mining rig about once a day.  More than half will err out over 12 hours.  They can't recover by themselves?</p>

<p>O.S.: Ubuntu Server 12.04
mining program: bfgminer 3.3.0</p>

<pre><code>$tmux
$sudo ~/bfgminer/bfgminer -o stratum+tcp://stratum.bitcoin.cz:3333 -u MYWORKER -p MYPASS -S all
</code></pre>

<p>ctrl-B, ctrl-D
close terminal session</p>

<p>Nothing else is plugged into a USB port.  It's one of the simplest setups I can think to make.
Block erupters are less than a month old.  Block erupters have all the current they'd want at 5V (external power supply and their current demand doesn't get anywhere near the limit of the p.s.)</p>

<p>I'll try to come back as soon as I can find any specific error messages.</p>

<p>Should I not keep the mining executable in my home directory?</p>

CC BY-SA 3.0
2013-11-14T23:47:50.293Z
Most problems with block erupters is because they don't get enough power. Most hubs (even powered ones) and laptop usb ports are complete garbage and deliver below spec power.

Which USB hub is this on, and with which power supply?
Dr.Haribo
CC BY-SA 3.0
2013-11-15T01:33:06.907Z
this usb hub: http://www.amazon.com/10-Port-USB-2-0-Hub/dp/B00475WJEY/ref=sr_1_22?ie=UTF8&qid=1384479175&sr=8-22&keywords=usb+hub
tarabyte
CC BY-SA 3.0
2013-11-15T01:33:22.987Z
powered with an external power supply that should be able to deliver up to 12A @5V
tarabyte
CC BY-SA 3.0
2013-11-15T02:23:37.370Z
I've gotten this error occassionally: ./bfgminer: error while loading shared libraries: libblkmaker_jansson-0.1.so.0: cannot open shared object file: No such file or directory
tarabyte
CC BY-SA 3.0
2013-11-15T02:32:47.163Z
OK, so I found this thread: https://bitcointalk.org/index.php?topic=168174.140.  Re-cloning, configuring, makeing, and not moving directories around.  We'll see if the problem persists.
tarabyte
CC BY-SA 3.0
2013-11-15T16:57:04.133Z
Problem persists! I found all my block erupters in the external hub erred out this morning.  Is it cooling?  The room they're in is pretty cool (windows was open and frosty outside) and exaust of power supply is on them, but I don't have a fan on them.  This is the error line: ICA 0:       | OFF  /244.3/234.5Mh/s | A:  657 R: 3+0(.45%) HW: 16/.83%
tarabyte
<miner-configuration><mining-setup><bfgminer><error>
Block Erupters Continue to err out
tarabyte
# Block Erupters Continue to err out

(Asked by: username_0 on 2013-11-14)

Does anyone else have this problem? I have to restart that computer and mining rig about once a day. More than half will err out over 12 hours. They can't recover by themselves?

O.S.: Ubuntu Server 12.04
mining program: bfgminer 3.3.0

```
$tmux
$sudo ~/bfgminer/bfgminer -o stratum+tcp://stratum.bitcoin.cz:3333 -u MYWORKER -p MYPASS -S all

```

ctrl-B, ctrl-D
close terminal session

Nothing else is plugged into a USB port. It's one of the simplest setups I can think to make.
Block erupters are less than a month old. Block erupters have all the current they'd want at 5V (external power supply and their current demand doesn't get anywhere near the limit of the p.s.)

I'll try to come back as soon as I can find any specific error messages.

Should I not keep the mining executable in my home directory?

**Tags:** miner-configuration, mining-setup, bfgminer, error

> **Comments:**
> **username_1**: Most problems with block erupters is because they don't get enough power. Most hubs (even powered ones) and laptop usb ports are complete garbage and deliver below spec power.  Which USB hub is this on, and with which power supply?  
> **username_0**: this usb hub: http://www.amazon.com/10-Port-USB-2-0-Hub/dp/B00475WJEY/ref=sr_1_22?ie=UTF8&qid=1384479175&sr=8-22&keywords=usb+hub  
> **username_0**: powered with an external power supply that should be able to deliver up to 12A @5V  
> **username_0**: I've gotten this error occassionally: ./bfgminer: error while loading shared libraries: libblkmaker_jansson-0.1.so.0: cannot open shared object file: No such file or directory  
> **username_0**: OK, so I found this thread: https://bitcointalk.org/index.php?topic=168174.140.  Re-cloning, configuring, makeing, and not moving directories around.  We'll see if the problem persists.  
> **username_0**: Problem persists! I found all my block erupters in the external hub erred out this morning.  Is it cooling?  The room they're in is pretty cool (windows was open and frosty outside) and exaust of power supply is on them, but I don't have a fan on them.  This is the error line: ICA 0:       | OFF  /244.3/234.5Mh/s | A:  657 R: 3+0(.45%) HW: 16/.83%  

---

## 0 answers

