I got a 100G increase in hash rate by changing the clock from 350 to 400 - but this did increase temps by 3 degrees and I think I got more 'don't match task_buffer_match' on one of the chips so I reduced back to 350 as advised.#
Correct me if I'm wrong but does
ch1-as29: dev->task_buffer_wr{0x000034df}rd{0x00003b43}ret work_id{0xbab6} don't match task_buffer_match{0x3ab6}
mean ASIC chip 29 on chain 1 is faulty? It looks like its flipping a bit (0xb is 0x8 above 0x3 - all occurrences of this message in my kernel log are on ch1-as29 and all of them have the same difference between the two values - this would correspond to bit 4 in the first byte being 1 when it should be 0 or 0 when it should be 1 - I am guessing that this will happen 50% of the time - since its binary - and affects 1 out of 60 ASICs - since that's how many the S5 has, so I am getting an error in less than 1% of my hardware).
Also, top tip for you all: if your miner struggles to start mining, but does eventually, you may have a DNS problem. This happened to me - I have mine on a TPLink Powerline to my ADSL router and when it comes up I got no ping for quite a while - 10 minute or so. I guessed this was down to the miner's DHCP configuration and sure enough. adding a name server to /etc/resolv.conf got ping working. So if you get this problem and want to fix it, do this....
ssh to your miner:
root@myhost:~# ssh
root@antminer.local (or its IP address if your router doesn't give it a name)
password is 'admin'
root@antMiner:~# vi /usr/share/udhcpc/default.script
add
dns="8.8.8.8 8.8.8.4"
to the file before the 'exec run-parts' line and save the change.
Now, when DHCP sets up your interface it will add these two IP addresses as name servers in /etc/resolv.conf. Try it by running
root@antMiner:~# udhcpc
You should see....
root@antMiner:~# udhcpc
udhcpc (v1.20.2) started
Sending discover...
Sending select for 192.168.1.66...
Lease of 192.168.1.66 obtained, lease time 86400
/etc/udhcpc.d/50default: Adding DNS 8.8.8.8
/etc/udhcpc.d/50default: Adding DNS 8.8.8.4