someone pm'ed me with some problems but imo, i think it can be fixed....

btw here is my reply


as far as i know & with my experience this is what i can advise you to do.

1. again n again, pls make sure all, i mean ALL connections are connected to where they belong. 1 of my miner was not hashing after i swapped SD cards then i realised 1 connector was not properly connected then all was ok !

2. i had 1 blade out of5 was hashing 20ghs slower i was like , a chip is broken checked here and there, HW is fine. it was the software part ! i set the voltage to 850mv then all blades was hashing well at same advertised speed & to my surprise, there was lesser HW errors.

3. add 2 more fans at the front of intake. i bought a 4 pin fan splitter & used a good double sided tape. that should keep the miner cooler. the cooler the better. i swapped the original fans to the front cuz my new fans (delta 4400 rpm) are alot more powerful at the back to suck the hot air out.

hope you fixed your problem. pls let me know or post on the thread if you need more help or discovered something new that can help others too.

oh and also maybe try to swap sd cards or upload a new firmware. i had a problem, the miner hashes away but i can't login to the machine to configure. so i swapped sd cards, it was ok but then i still can't login. solution, i formatted sd card, upload new image & before plugging it in, i reset my router & pc then plug in boot everything up & voila everything works fine now. so far so good.

and also make sure the screws holding the blades are heightened up properly. check the heatsinks too. i used super glue to glue it back in place. it comes loose easily.

i did the raise the backplane connecting all 5 modules by a little so it does not touch the heatsinks to prevent a burn onit. thx for the tip !

Talk about spoiled kids, whining because a company wont lie so you can cheat yourself out of paying what you are suppose to.

What's frustrating, is if any of you have ever dealt with a Bitmain return... They ask you to declare at $10 and label as 'computer gateway', so they don't have to pay import tax their end, but expect us to pay full whack. I know they're one of the best ASIC manufacturers around, but c'mon, need to declare the value lower!

made an offer better than 6.5.... pm'ed but no reply so I'd assume rejected?

--
DESK DEBIAN SETUP GUIDE v1.0
--

The SD card image can be downloaded from:
https://mega.co.nz/#!pVtGGCwD!z_L2dMPP1Zl9VuvJLqZIkOyxTltyQUMdIGEyD7pW64E

can be used for read/write with
http://sourceforge.net/p/win32diskimager/wiki/Home/.


*****************************************
Advice: buy an extra SD card 8GB for this purpose,
dont use the original.
*****************************************



What I have done is basicly make an tar copy of
/mineros/
/etc/

then installed debian on a external pi, with other SD card.
Unzipped the backup tar on the debian FS,
and debugged all day to get the dependencies right.

For convienence I have made a shell script for doing it at once.


/root/setup_bitmine_desk_configuration.sh:
#!/bin/bash
sudo apt-get update
sudo apt-get install build-essential \
         autoconf \
         automake \
         libtool \
         pkg-config \
         libcurl4-gnutls-dev \
         libjansson-dev \
         uthash-dev \
         libncursesw5-dev \
         libncurses5-dev \
         libudev-dev \
         libusb-1.0-0-dev \
         libevent-dev \
         libmicrohttpd-dev \
         git \
         screen \
         sqlite3 \
         python2.7 \
         curl \
         perl \
         openssl \
         libc6 \
         libtasn1-3 \
         zlib1g \
         libreadline-dev \
         libkmod-dev \
         dropbear \
         python-setuptools \
         i2c-tools \
         python-smbus \
         python-pexpect \
         python-psutil \
         python-cherrypy \
         python-cherrypy3 \
         python-mako \
         python-simplejson \
         plymouth \
         wpasupplicant
sudo rm -rf cgminer
git clone https://github.com/ckolivas/cgminer cgminer
cd cgminer
sudo ./autogen.sh
sudo ./configure --disable-avalon --disable-opencl --enable-icarus --disable-modmine  --disable-klondike --enable-bflsc --enable-bitforce  --with-system-libusb
sudo make


CGMINER_VERSION=$(/root/cgminer/cgminer -V);
NEW_NAME=$(echo "$CGMINER_VERSION" | sed 's/[ ]/_/g');
mv /root/cgminer/ /root/$NEW_NAME;
rm -rf /bin/cgminer;
ln -s /root/$NEW_NAME/cgminer /bin/cgminer

cd /root
sudo easy_install -U RPIO

cat << EOF > /etc/modprobe.d/raspi-blacklist.conf
#blacklist spi and i2c by default (many users don't need them)
#blacklist spi-bcm2708
blacklist i2c-bcm2708
EOF


##
## USE ON OWN RISK! runtimelevels for starting
##
##   ln -s /mineros/boot.py /etc/init.d/boot.py
##   ln -s /etc/init.d/boot.py /etc/rc1.d/K99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc4.d/S99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc5.d/S99boot.py
##     ln -s /etc/init.d/boot.py /etc/rc2.d/S99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc3.d/S99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc6.d/K99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc0.d/K99boot.py
##
##./init.d/boot.py
##lrwxrwxrwx 1 root root   16 May  3 07:18 boot.py -> /mineros/boot.py
##./rc1.d/K99boot.py
##lrwxrwxrwx 1 root root  17 May  3 08:31 K99boot.py -> ../init.d/boot.py
##./rc4.d/S99boot.py
##lrwxrwxrwx 1 root root  17 May  3 08:31 K99boot.py -> ../init.d/boot.py
##./rc5.d/S99boot.py
##lrwxrwxrwx 1 root root  17 May  3 08:31 S99boot.py -> ../init.d/boot.py
##./rc2.d/S99boot.py
##lrwxrwxrwx 1 root root  17 May  3 08:31 S99boot.py -> ../init.d/boot.py
##./rc3.d/S99boot.py
##lrwxrwxrwx 1 root root  17 May  3 08:31 S99boot.py -> ../init.d/boot.py
##./rc6.d/K99boot.py
##lrwxrwxrwx 1 root root  17 May  3 08:31 S99boot.py -> ../init.d/boot.py
##./rc0.d/K99boot.py
##lrwxrwxrwx 1 root root  17 May  3 08:31 K99boot.py -> ../init.d/boot.py


as You can see it will first update all dependencies,
then compile cgminer and link it all.
Afterwards 2 things still need to be done:

-auto start mineros.
for this is the backup tar of /etc needed, because of all the symlinks being used,
for ex. /etc/rc0.d/K99boot.py links to /etc/init.d/boot.py,
which links to /mineros/boot.py.

Im not sure if linking it will do

##   ln -s /mineros/boot.py /etc/init.d/boot.py
##   ln -s /etc/init.d/boot.py /etc/rc1.d/K99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc4.d/S99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc5.d/S99boot.py
##     ln -s /etc/init.d/boot.py /etc/rc2.d/S99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc3.d/S99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc6.d/K99boot.py
##   ln -s /etc/init.d/boot.py /etc/rc0.d/K99boot.py

also executed:
cd /etc/init.d/
insserv boot.py
and changed the runtimelevel to 99 afterwards.

Still the boot.py in the mineros folder is NOT correct:

insserv: warning: script 'boot.py' missing LSB tags and overrides
To add an header use:
https://wiki.debian.org/LSBInitScripts

afterwards you can remove the header, otherwise python cant execute the file.

An other thing that needs configuring is WLAN (if needed)
nano /etc/networking/interfaces

auto lo
iface lo inet loopback
iface eth0 inet dhcp

auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
        #wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
        wpa-ssid <YOUR_SSID_HERE>
        wpa-psk <YOUR_PASSWORD_HERE>
        wpa-key-mgmt WPA-PSK
        wpa-group TKIP CCMP


NOTE the 2 lines:
        wpa-ssid <YOUR_SSID_HERE>
        wpa-psk <YOUR_PASSWORD_HERE>



BITMINE:
1.
What I didnt get working is the front display showing the ip address of the WLAN interface.
It works for eth0, not for wlan0.
2.
If you look at cgminer's output, I see lot of underflow warnings. (not enough work)
Why?

ssh into machine
execute:
screen -DR


 0: BA1 0       :   0: 8/256              | 231.5G / 226.9Gh/s WU:3071.1/m
 1: BA1 1       :   1: 8/254              | 237.1G / 228.5Gh/s WU:3159.6/m
 2: BA1 2       :   2: 8/256              | 236.3G / 231.0Gh/s WU:3191.1/m
 3: BA1 3       :   3: 8/254              | 232.8G / 221.5Gh/s WU:3003.2/m
 4: BA1 4       :   4: 8/256              | 241.7G / 231.4Gh/s WU:3201.5/m
--------------------------------------------------------------------------------
 [2014-05-03 17:05:11] 3: chip 1: work underflow
 [2014-05-03 17:05:11] 4: chip 8: work underflow
 [2014-05-03 17:05:11] 4: chip 7: work underflow
 [2014-05-03 17:05:11] 4: chip 6: work underflow
 [2014-05-03 17:05:11] 4: chip 5: work underflow
 [2014-05-03 17:05:11] 4: chip 4: work underflow
 [2014-05-03 17:05:11] 4: chip 3: work underflow
 [2014-05-03 17:05:11] 4: chip 2: work underflow
 [2014-05-03 17:05:11] 4: chip 1: work underflow

(with above the desk is connected through eth0, to make sure it wasnt the wlan0 causing it)
(its only during startup)


3. Memory doesnt show up anymore. It shows 0.....

hope it helps also for you guys,
have phun with it!