The "no block source" message indicates that Bitcoin-Qt cannot connect to other peers. There are many reasons why this might be the case. Are you having any problems with your Internet connection? Are your running Bitcoin-Qt through Tor or another proxy, and if so, are other applications able to connect through it? Have your changed your firewall or antivirus settings, and have they given any warnings lately? They may be blocking your connection without your knowledge. Have you installed any other software or made any changes to your Internet connection before your problems started? If you could provide such information without meaningless threats, that would be much appreciated.

Yes - I've just done this.

1) log into GUI and go to System --> Software --> [ Update lists ]   then wait a bit
2) Under Status, click the /Available Packages\ tab then click the /S\ tab
3) Scroll down to snmpd and click install.  You can ignore the snmpd-static and snmpd-utils packages.

4) SSH to your miner and log in as root
5) vi  /etc/snmp/snmpd.conf  and set it like this

rocommunity Waizphzbp3
exec minerstatus1 /bin/sh /root/cgminer-api-summary


6) vi /root/cgminer-api-summary    and set the contents like this

/usr/bin/cgminer-api stats      | egrep "temp|fan" | grep -v "Reply was"  | tr -d " []><()" | tr "=" ":"
/usr/bin/cgminer-api coin       | egrep "Time|Difficulty" | grep -v "Reply was"  | tr -d " []><()" | tr "=" ":"

7) Back to the web gui, go to System --> Startup  and "enable snmpd"   then click the start button for snmpd.

FAIL  This is the bit I haven't done yet.  My miner is not publicly accessible, so I simply disabled its firewall.
If you have an uncontrolled environment, you want to permit port 161 UDP from the monitoring host only.

9) To scan it I did this on my remote host.

snmpwalk -Os -c Waizphzbp3 -v 2c 192.168.1.93   .1.3.6.1.4.1.2021.8

which returns this output:

extIndex.1 = INTEGER: 1
extNames.1 = STRING: minerstatus1
extCommand.1 = STRING: /bin/sh /root/cgminer-api-summary
extResult.1 = INTEGER: 0
extOutput.1 = STRING: fan_num:1
fan1:2820
fan2:0
fan3:0
fan4:0
temp_num:2
temp1:41
temp2:44
temp3:0
temp4:0
temp_avg:42
temp_max:45
temp_hi:44
overheat_temp:0
opt_bitmain_temp:50
opt_bitmain_fan_min:32
opt_bitmain_fan_max:160
PoolAttempts:0
CurrentBlockTime:1405304337.011621
NetworkDifficulty:17336316978.50783100
extErrFix.1 = INTEGER: noError(0)
extErrFixCmd.1 = STRING:

So my S1 is at 41 and 44 degrees C, with the front fan doing 2820 RPM .  My rear fan is only 3 wire and doesn't report speeds.


To customise, simply edit the shell script in /root/cgminer-api-summary to suit your needs.
There are a heap of different options that  cgminer-api takes, the shell script simply formats them.
Some of the ones I've looks at:

/usr/bin/cgminer-api devs                      Info on attached asics
/usr/bin/cgminer-api pools                     Info on pools
/usr/bin/cgminer-api switchpool                Change to another configured pool
/usr/bin/cgminer-api notify                    unsure
/usr/bin/cgminer-api devdetails                device info, more details
/usr/bin/cgminer-api stats
/usr/bin/cgminer-api summary
/usr/bin/cgminer-api config         failover info
/usr/bin/cgminer-api coin           stats about current block and difficulty
/usr/bin/cgminer-api usbstats               Lots of stuff
/usr/bin/cgminer-api zero           reset counters ?
/usr/bin/cgminer-api hotplug                ?
/usr/bin/cgminer-api ascset         configure asics on the fly
/usr/bin/cgminer-api asccount               count attached asics
/usr/bin/cgminer-api lockstats              dunno - not compiled
/usr/bin/cgminer-api edevs          devs but for devices that are enabled only
/usr/bin/cgminer-api estats         stats but for enabled devices only.
/usr/bin/cgminer-api lcd                    One liner?  Not compiled in


Any questions please ask, and if you have fiddled your firewall please let us know the clean tidy way to do that.