Raspberry pi usb device limitation?

[BR0KK]

Tried every release. Nothing works for me ;(

[1714181808]

1714181808

[hardcore-fs]

It is not just a USB issue.

If you look at the chip infrastructure (like many devices now), the USB mesh is used for routing other services.
In this case Ethernet.
Since it is cheaper to design and implement an Ethernet->USB device, than a CPU->Ethernet chip (far more market)
Many manufacturers do the same.

Unfortunately if your USB mesh goes tits up then so does everything else connected to the mesh.
The issue appears to be related to the (USB) chip needing to be run using RTOS rather than a scheduling OS.
Since Linux is a scheduling OS, it generally does not run well when a particular chip DEMANDS to be serviced at exactly the right time.


The  USB chip DEMANDS to be serviced and if it does not get its way, it tells the CPU to sod off.

That appears to be the issue they have.

HC

[nick0016]

Why not just snip it in the USB cord?

Easier and faster than breaking my USB cord

[BR0KK]

That didn't help for long... The device locks up On a random base.
I might use the pi for something else

[SLok]

Thanks all for your efforts and sharing them. Just bought an msi wind netbook for €60. I don't think I'm going to get a RPi up and running stable enough for mining, at least not at this moment.

[AmDD]

Thanks all for your efforts and sharing them. Just bought an msi wind netbook for €60. I don't think I'm going to get a RPi up and running stable enough for mining, at least not at this moment.

I agree, I originally bought 2 rpi's just for mining but after the issues I had and issues I read about from you all I changed my mind. I have an old laptop that's got 4 USB ports, a decent battery and it only uses 25 watts. I'm sure I can get it below at least 20 by turning off wifi and the screen. This will be more reliable and have a battery backup, plus only cost me $15 a year vs the rip @ $6 a year.

[ChipGeek]

My RasPi with one BFL Single has been mining perfectly for ~ 4 weeks now.  One typical problem with the RaspPi is the input power.  Most 5V adapters aren't really up to the job.  I have a 5.25V 1A power adapter that is rock solid.  I bought it here:
http://adafruit.com/products/501

I also like their case:
http://adafruit.com/products/859

Disclaimer: I have no connection with them other than being a happy customer.

Edit:  I understand that there is likely a problem with the USB interface if using many mining devices.  I just wanted to point out that it works fine with one.  I'm hoping it will also work perfectly with 1 or 2 ASIC devices when they become available.

[vitruvio]

I hope my Rpi can manage my only Little Single I've preorder.

Regards

[CrazyGuy]

So my 512mb Pi came in yesterday. I set it up today and I've been mining with 1 BFL single for the past hour with no issue. I'm going to let it go a little longer then throw 8 more at it.

- CGIMiner 2.9.1 Stratum mining on Slush
Mem allocation:
-16mb GPU
-498mb RAM
Ethernet
No display out
No Keyboard
No Mouse

I'll let ya'll know how it goes.

[CrazyGuy]

Well, that was disappointing. Seemed promising but with 1 BFL Single, the Pi crapped out after a few hours.

[quasarbtc]

Well, that was disappointing. Seemed promising but with 1 BFL Single, the Pi crapped out after a few hours.

Disappointing. Any idea as to the source of the problem?

[Berni]

Well, that was disappointing. Seemed promising but with 1 BFL Single, the Pi crapped out after a few hours.

Perhaps a problem with the cgminer version?
Is there a stable version that supports the BFL Single?

[psilan]

Ah that is disappointing .
Tried using different mining software?

My single is about to arrive. I have 2 Pi's ready for ASIC....dream on I think.

[Berni]

I have 2 Pi's ready for ASIC....dream on I think.

I hope too.
My Problem is i can't test, because i have only GPUs, no FPGA or something else.

But a few Raspberry PI 

[CrazyGuy]

Well, that was disappointing. Seemed promising but with 1 BFL Single, the Pi crapped out after a few hours.

Perhaps a problem with the cgminer version?
Is there a stable version that supports the BFL Single?

I haven't had time to research it but I'm sure it has something to do with the USB COM issues plaguing the Pi. I was actually very hopeful as it was running perfectly for 3 hours, then it just shut off.

[ChipGeek]

Make sure you have a really good 5V supply.  MANY people have reported having problems with their RPi and the problems have gone away with a better supply.  I use a 5.25V supply from Adafruit and run a BFL Single on cgminer for multiple weeks at a time.

http://www.adafruit.com/products/501

[psilan]

I have a 512 and a 256. BFL single should arrive on Monday.

Anybody want me to try anything when I set this up?

[crazyates]

Would this USB/Ethernet limitation extend beyond the Rpi? I got a MK802 on the way, and while it's got wifi, I was thinking about a USB/Ethernet adapter.

[phr33]

To summarize USB usage on RPi:

• Check your supplied voltage! Both PSU and cable must be good! http://elinux.org/File:RPI_Test_Points.JPG
• Use powered USB hub

[hardcore-fs]

To summarize USB usage on RPi:

• Check your supplied voltage! Both PSU and cable must be good! http://elinux.org/File:RPI_Test_Points.JPG
• Use powered USB hub

... actually this should be a pre-pre- warning for those companies attempting to power  'miners' off the USB ports.