Saturday, April 29, 2017

Gridseed dual mining on minera

This is something that caught my interest a few years ago and has been sitting in the garage churning out tiny fractions of a bitcoin regularly.

Bitcoin spiked back up to $1700 recently and previously it wasn't worth the power to mine but might be now.  I buy my etc stuff with bitcoin.

My original setup uses a raspberry pi with minera ( to have a simple web based front end for 6 gridseed minis.  These are a unit with 5 gridseed chips together.  The gridseed chip can mine SHA256 (bitcoin etc) and scrypt (litecoin, doge etc) and both at the same time.

These just sat quietly mining scrypt which a site called converts to Bitcoin and adds to your wallet. All very easy.

I could never get them to mine bitcoin or dual mine both and gave up but revisiting it showed it wasn't really that hard with the right mining client. I haven't got the nice front end to work yet.  That's the last step.

To get Bitcoin (SHA256) to work, SSH to your raspberry pi with Minera and you run

screen sudo /var/www/minera/minera-bin/cgminer-dmaxl-zeus --sha256 -o stratum+tcp:// --user nickbrooker.1 --pass x --gridseed-options freq=800 --widescreen

You can use my details if you want to give me some extra BTC :-)

The cunning part is this software sets up local UDP listeners when running on SHA256 to allow a second copy to connect via UDP to the scrypt side.

 cgminer version 4.3.5-scrypt.2 - Started: [2017-04-29 10:44:40]
 (5s):0.000 (1m):0.000 (5m):0.000 (15m):0.000 (avg):0.000h/s
 A:0  R:0  HW:1  WU:883.5/m | ST: 5  SS: 0  NB: 1  LW: 48  GF: 0  RF: 0
 Connected to diff 2.05K with stratum as user nickbrooker.1
 Block: 12519e6d...  Diff:522G  Started: [10:44:40]  Best share: 1.69K
 [U]SB management [P]ool management [S]ettings [D]isplay options [Q]uit
 0: GSD 8D8638654955:  800 MHz  SHA256        | 1.331G / 4.684Gh/s WU:130.9/m
 1: GSD 8D8848665055:  800 MHz  SHA256        | 1.322G / 4.684Gh/s WU:98.2/m
 2: GSD 8D8307735055:  800 MHz  SHA256        | 1.346G / 4.684Gh/s WU:98.2/m
 3: GSD 8D8340625055:  800 MHz  SHA256        | 1.376G / 4.684Gh/s WU:163.6/m
 4: GSD 6D8527885750:  800 MHz  SHA256        | 1.317G / 4.684Gh/s WU:261.8/m
 5: GSD 6D7631994853:  800 MHz  SHA256        | 564.5M / 2.342Gh/s WU:130.9/m
 [2017-04-29 10:44:35] Gridseed device found, firmware v01140113, driver v3.8.5.20140210.02, ID 8D8307735055
 [2017-04-29 10:44:35] GSD2: System reseting
 [2017-04-29 10:44:35] GSD2: Set GC3355 core frequency to 800 MHz
 [2017-04-29 10:44:36] GridSeed options: 'freq=800'
 [2017-04-29 10:44:36] Gridseed device found, firmware v01140113, driver v3.8.5.20140210.02, ID 8D8340625055
 [2017-04-29 10:44:36] GSD3: System reseting
 [2017-04-29 10:44:36] GSD3: Set GC3355 core frequency to 800 MHz
 [2017-04-29 10:44:37] GridSeed options: 'freq=800'
 [2017-04-29 10:44:37] Gridseed device found, firmware v01140113, driver v3.8.5.20140210.02, ID 6D8527885750
 [2017-04-29 10:44:37] GSD4: System reseting
 [2017-04-29 10:44:38] GSD4: Set GC3355 core frequency to 800 MHz
 [2017-04-29 10:44:38] GridSeed options: 'freq=800'
 [2017-04-29 10:44:38] Gridseed device found, firmware v01140113, driver v3.8.5.20140210.02, ID 6D7631994853
 [2017-04-29 10:44:38] GSD5: System reseting
 [2017-04-29 10:44:39] GSD5: Set GC3355 core frequency to 800 MHz
 [2017-04-29 10:44:39] Create scrypt proxy on 3350/UDP for GSD0
 [2017-04-29 10:44:39] GridSeed GSD0 opened on usb:1:11
 [2017-04-29 10:44:39] Create scrypt proxy on 3351/UDP for GSD1
 [2017-04-29 10:44:39] GridSeed GSD1 opened on usb:1:9
 [2017-04-29 10:44:39] Create scrypt proxy on 3352/UDP for GSD2
 [2017-04-29 10:44:39] GridSeed GSD2 opened on usb:1:7
 [2017-04-29 10:44:39] Create scrypt proxy on 3353/UDP for GSD3
 [2017-04-29 10:44:39] GridSeed GSD3 opened on usb:1:12
 [2017-04-29 10:44:39] Create scrypt proxy on 3354/UDP for GSD4
 [2017-04-29 10:44:39] GridSeed GSD4 opened on usb:1:10
 [2017-04-29 10:44:39] Create scrypt proxy on 3355/UDP for GSD5
 [2017-04-29 10:44:39] GridSeed GSD5 opened on usb:1:8
 [2017-04-29 10:44:39] Probing for an alive pool
 [2017-04-29 10:44:40] Pool 0 difficulty changed to 2048

 [2017-04-29 10:44:40] Network diff set to 522G

So disconnect from screen  (Ctrl A, Ctrl D) and start

screen sudo /var/www/minera/minera-bin/cgminer-dmaxl-zeus --scrypt  -o stratum+tcp:// -u nickbrooker.1 -p x --widescreen

It will check local host and connect to the ports automatically.

cgminer version 4.3.5-scrypt.2 - Started: [2017-04-29 10:24:30]
 (5s):883.0K (1m):106.3K (5m):21.89K (15m):7.333K (avg):1.489Mh/s
 A:512  R:0  HW:0  WU:15.3/m | ST: 3  SS: 0  NB: 1  LW: 26  GF: 0  RF: 0
 Connected to diff 512 with stratum as user nickbrooker.1
 Block: 8dd69347...  Diff:146K  Started: [10:24:30]  Best share: 710
 [U]SB management [P]ool management [S]ettings [D]isplay options [Q]uit
 0: GSD 8D8638654955:  800 MHz  DUAL / SCRYPT | 136.8K / 260.8Kh/s WU:0.0/m
 1: GSD 8D8848665055:  800 MHz  DUAL / SCRYPT | 136.8K / 260.9Kh/s WU:0.0/m 
 2: GSD 8D8307735055:  800 MHz  DUAL / SCRYPT | 145.1K / 272.6Kh/s WU:15.3/m
 3: GSD 8D8340625055:  800 MHz  DUAL / SCRYPT | 136.9K / 260.9Kh/s WU: 0.0/m
 4: GSD 6D8527885750:  800 MHz  DUAL / SCRYPT | 136.9K / 261.1Kh/s WU: 0.0/m
 5: GSD 6D7631994853:  800 MHz  DUAL / SCRYPT | 136.8K / 260.8Kh/s WU: 0.0/m
 [2017-04-29 10:24:27] Started cgminer 4.3.5-scrypt.2
 [2017-04-29 10:24:27] Found scrypt proxy on 3350/UDP
 [2017-04-29 10:24:27] Found scrypt proxy on 3351/UDP
 [2017-04-29 10:24:27] Found scrypt proxy on 3352/UDP
 [2017-04-29 10:24:27] Found scrypt proxy on 3353/UDP
 [2017-04-29 10:24:27] Found scrypt proxy on 3354/UDP
 [2017-04-29 10:24:27] Found scrypt proxy on 3355/UDP
 [2017-04-29 10:24:28] Gridseed GSD0 opened on 3350/UDP
 [2017-04-29 10:24:28] Gridseed GSD1 opened on 3351/UDP
 [2017-04-29 10:24:28] Gridseed GSD2 opened on 3352/UDP
 [2017-04-29 10:24:28] Gridseed GSD3 opened on 3353/UDP
 [2017-04-29 10:24:28] Gridseed GSD4 opened on 3354/UDP
 [2017-04-29 10:24:28] Gridseed GSD5 opened on 3355/UDP
 [2017-04-29 10:24:28] Probing for an alive pool

So now they are happily mining away on both scrypt and SHA256.  You're never really going to make money on this unless you are exceedingly lucky and mine solo and solve a bunch of blocks. It just a fun thing to do.

Update:  seems one thing to be careful of is power supplies. I have 6 of these gridseed minis and they draw 6 watts in scrypt and I read 30 watts in SHA256 but it may be more.  I have a 12V 30A power supply that just expired and was a bit toastie.

Tuesday, April 4, 2017

Windows 8.1 over Windows 7

This one may save someone some time. One of the kid's computers was on windows 7 and I thought it might be nice to try going to 8 as they've put the countdown on windows 7.

I tried the DVD from within Windows 7 and booting the DVD. Booting from the DVD won't let you update and from within Windows it failed after it got to 100%.

I had recently installed an SSD and disabled superfetch and Windows search services. After trying a few other things I re-enabled these and it worked.

Monday, December 12, 2016

Linux kernel 4.9 amdgpu blank screen in Gentoo

After updating to kernel 4.9 I ended up with a blank screen after grub.

Booted back to 4.8 and checked logs and found a firmware file was showing as erroring and load not loading:


So I had to add that to firmware load files in the generic device drivers of the kernel and now all works.

It had a firmware file


before so the k one is new in 4.9.

Sunday, November 13, 2016

LG LED IPS 24MP68VQ-P monitor review (sort of)

I thought it was time for a new monitor and a local sale gave me the incentive. The main reason I wanted a new monitor was primarily Freesync for gaming and watching video.

After reading reviews I had a couple of favourites. This LG and a Viewsonic fitted my specs and price.

On the night the LG was there and had quite a hefty discount and I like LG gear.  I think it's the quieter, less flashy (dare I say better?) sibling of Samsung.

Going from a 2009 or so Viewsonic 24 VX monitor to this LG is quite a revelation. I'm not saying the Viewsonic is bad, it's just an LCD panel that is older technology. I would happily buy another Viewsonic.

First off the size. Same viewable size but the LG is barely bigger than the panel. I could have gotten a 27" LG taking the same space as the old monitor.  It's barely 15mm  deep. The base is also smaller as the monitor is lighter hence more desk space returned.

Brightness/contrast:  panel technology has moved on a lot in seven years it seems. It is so much brighter and still black is black, so better contrast.  The colour accuracy, if the included output sheet is to be believed, is a huge improvement as well.

Gaming/video: once I found the freesync switch (see cons later) it makes quite a difference if you have a new AMD video card (CGN 3 and up so RX9 300 +)  Gaming is sharper and watching video (especially fullHD BD etc) no longer tears.  It is just nicer.

The cons: the controls of this monitor are by a little joystick facing down under the panel. This is a bit fiddly and not very descriptive. Settings like Freesync were off and you'd think they would default to on since they won't work unless the video card supports them. So nothing major.

To be fair most new monitors would provide these but I'm quite stunned how for not much money you get what is normal today and is such an improvement over what was OK 5 years ago.  I guess it's like cars.

So if you have an old monitor, go do yourself a favour and find yourself something like this and upgrade.  It's smaller, better to look at and uses less power.

Tuesday, September 27, 2016

Why I'm driving to work again

Well today is my first day of driving to work in over 7 months.

Yet another train/track fault last night was the final straw.  Why is Auckland transport making new tracks when it can't even maintain what it has already? Too many times it's "OK get off here, go and find a bus" or trains just vanish from the timetable.

For public transport to succeed it needs to be cheap, reliable and easy.  Auckland transport is reasonably priced is 0.5 out of 3.

Make it free and get people to use it, then either add a small charge or remove  some of the council bloat and put that towards public transport. Once more people use it then it should get more frequent.  Again as no-one had forethought, some tracks a single lines so you can only have one train tieing up the line beyond Penrose to Onehunga for example.  That needs to change to twin lines everywhere and trains to the airport and north shore to at least Albany. Don’t try and milk it to make money just make it good. Every household contributes $1000 a year or so in rates for it if I recall correctly.

It needs to be easy.  Needs to be a no brainer to use.  I take the train because each time I've taken the bus it's been like being a passenger in a rally car and it's impossible to read etc. Whoever thought that any park and ride is big enough obviously doesn't use them. All the ones I know about are full early and New Lynn doesn't even have one. And just little things like the times they run.  I would get to town at 8:32.  Great, not many people take 28 minutes to get to their offices. I gained almost an hour in my day today by driving.

I'm generally for small government but public transport is something that needs to be right for a city to function. You should be able to jump on something go to an event or out for dinner and know you can get home safely even if you've had a few drinks.

If you can't do it properly just make the main roads bigger and give up.  Let Uber rule transport and give me a third of my rates back.

I do miss an hour reading each day though.

Yes, TL:DR.

Tuesday, June 21, 2016

Linux Wake on LAN with Realtek RTL8111F

So I splashed out and bought a new motherboard, CPU and RAM after finding my motherboard BIOS was last updated in 2010 and upgrading the RAM was going to cost more than a new combo.

Quite a difference.  I can compile Firefox, LibreOffice, Webkit etc in about 20 to 25 per cent of the time it used to take.

I've converted everything from old MBR to GPT and booting with UEFI boot files which is quite cool.

One thing I couldn't get going was wakeonlan.

I set wakeonlan to magic packet (g in ethtool) but it would not wake up. I'm using kernel 4.6.2 so that's the most recent stable for Gentoo.

After some searching I found another network problem with the RTL8111F that they fixed by using a driver from Realtek's web site.

So I went to this page

and downloaded the driver for 3.X kernels.  I build kernels in the monolithic style so, disabled the RTL8168 driver (I think the kernel calls it that or rtl8169) and rebooted.  The download from ReakTek has a script that  unloads the rtl8168 module and compiles the new one and loads it.

Low and behold, after that WoL started working.  So maybe the kernel driver for the Realtek cards needs some love.

Monday, June 20, 2016

Android phone Google account problems

Well I have to say I've lost a lot of respect for Google today.

I got a message on my phone from the Google account to say something suspicious had possibly gone on and I should change my password.

So I logged into the web site and double checked and changed my password.  Changed on the web browser OK and other machines but not on the phone.  No way.

You enter your details (username, password and 2 factor from Authenticator)  and you get "sorry, there seems to be a problem. please try again." Tried this a few times, rebooted etc but no joy.

So I deleted the account from the phone and tried re-adding it.  Nope still the same problems.  Search for this error and quite a few people have had it.  The suggested try an App specific password. Nope it say dah, enter your account password not an app specific one.

Finally got frustrated and removed the 2 factor from the account and that did it. So you have to unsecure your account to get your phone on.  How bad is that?

Hope this saves someone else some frustration.

Now to try turning two factor back on and see if it breaks.