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Author Topic: Raspberry pi usb device limitation?  (Read 14833 times)
FLHippy
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October 17, 2012, 01:55:46 AM
 #21


I would not trust it to mine with 6 ghash of equipment, it is not stable enough for that.  They are prone to overheat and turn off, also there is a lan bug in my rev 2. Drops randomly

yeah I have heard of this issue before - you aren't the only one  Angry

There was a release on around september 19th which was supposed to improve on this issue. Has anyone been able to verify a fix with the latest wheezy?
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jborkl
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October 17, 2012, 02:06:48 AM
 #22

No fix for me.. Still drops. It's okay though xbmc still is awesome

Got a email, new 512 shipped from element 14

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October 17, 2012, 08:23:05 AM
 #23

lol Raspberry Pi banned the guy for pointing out the faults with Broadcom's USB.

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&t=15320&sid=26ec7c5d29579e1ed13469d1e104bba7&start=25

Bid odd that a charity would not take criticism well (so I dug deeper!)...

...well it becomes clear when you realise the project co-founder is employed by Broadcom!

http://en.wikipedia.org/wiki/Raspberry_Pi_Foundation

Come on! How is that for a conflict of interest! No wonder it uses problematic Broadcom parts!
the USB is not a broadcom part that is bought in - and is a POS
all forums will have the troll issues and the more people you get the more of a problem it is

In the Beginning there was CPU , then GPU , then FPGA then ASIC, what next I hear to ask ....

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Gatorhex
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October 17, 2012, 12:19:48 PM
 #24

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the USB is not a broadcom part that is bought in
Splitting hairs, if it's Broadcom's SoC (System on a Chip) it's their problem for putting it in there.

If there's a fundamental problem with the USB people need to be made aware of it before purchase
and not sent on a wild goose chase to change their power supply after purchase.

For some people USB may not be critical to their application, and still buy it, but for Bitcoin mining it is.
Pi sellers need to point out the USB flaws near the "buy" button so consumers are not mislead.
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October 17, 2012, 12:34:35 PM
 #25

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the USB is not a broadcom part that is bought in
Splitting hairs, if it's Broadcom's SoC (System on a Chip) it's their problem for putting it in there.

If there's a fundamental problem with the USB people need to be made aware of it before purchase
and not sent on a wild goose chase to change their power supply after purchase.
(A typical ploy one could use to run out the consumers right to return goods under distance selling regulations).

For some people USB may not be critical to their application, and still buy it, but for Bitcoin mining it is.
Pi need to point out the USB flaws near the "buy" button so consumers are not mislead.

I'm on the fence with these issues.

On one side:
Most uses for the Pi aren't too power intensive. My initial ideas for a use are like others (XMBC or stuff with the GPIO ports)

On the other:
If they state certain specs, friggen deliver to those standards!

HolyScott
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October 18, 2012, 02:33:49 AM
 #26

I missed the early orders for the 512, I am on the email notify list.
jborkl
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October 18, 2012, 02:38:51 AM
 #27

i get mine tomorrow at work, hope ups shows up early.

I put my sd card in my wallet so it is with me at all times! just have to a find a hdmi

My New 512 does not suffer from lan bug

CrazyGuy
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October 20, 2012, 03:25:50 AM
 #28

i get mine tomorrow at work, hope ups shows up early.

I put my sd card in my wallet so it is with me at all times! just have to a find a hdmi

My New 512 does not suffer from lan bug

How long have you had your 512? Are you mining with it? I'm still hopeful I'll still be able to use mine with my singles.

ASICPuppy.net ASIC Mining Hardware and Accessories - 2Pacs in stock!
jborkl
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October 20, 2012, 04:02:29 AM
 #29

Got it yesterday. Got my mpeg2 lic today.

A little bit of trouble with xbmc 5,but I got the nightly build installed

Got the keyboard double press bug now

FLHippy
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October 20, 2012, 02:54:23 PM
 #30

Got it yesterday. Got my mpeg2 lic today.

A little bit of trouble with xbmc 5,but I got the nightly build installed

Got the keyboard double press bug now

keyboard double press bug?

I haven't had this problem at all, can you elaborate?
Gatorhex
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October 20, 2012, 04:01:13 PM
 #31

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keyboard double press bug?

I haven't had this problem at all, can you elaborate?

It's caused by the USB issues, talked about earlier in the thread, you may not notice it until the thing gets busy and starts queuing requests >1ms.

Giving the USB processes realtime priority on the CPU, and everything else a lower priority, is probably the best solution they can come up with for this mess.
jborkl
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October 20, 2012, 04:08:46 PM
 #32

Got it all worked out, working fine now.

This was more of a challenge than xbmc 4

CrazyGuy
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October 21, 2012, 02:35:52 AM
 #33

Got it all worked out, working fine now.

This was more of a challenge than xbmc 4

What did you figure out? Want to make sure I'm ready when mine comes in.

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jborkl
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October 21, 2012, 04:13:44 AM
 #34

Putty does not work, I am sure it can be fixed easily.

Eternal bootloop-says "relax xbmc will resume"  does not.  Hit escape and logged in as pi , raspberry. 

Unplugged usb devices and so on.

How I fixed bootloop- new ip address for some odd reason fixed it.

Text on the side of the screen when playing a movie in the black bars. Fixed it by doing video calibration(don't really understand why that fixed it either).

Double press error, booted up with mce keyboard plugged in. Ir receiver, no usb keyboard.

nick0016
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October 21, 2012, 06:28:47 AM
 #35

The USB problem is related to all USB devices.

For me removing the vc++ power from the USB and using seperate (USB powered hub) power adaptor fixed it.

Also; the Raspberry pi itself needs a good stable power supply or the board will crash random, especially under high load...

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CrazyGuy
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October 21, 2012, 01:57:52 PM
 #36

Are you saying you snipped the vcc power going from the powered hub so you don't blow the fuse?

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nick0016
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October 21, 2012, 03:40:37 PM
 #37

snipped the vc++ power from the USB connector on the board.
This way you will indeed not blow up the fuse but also prevents current leaked back into the board from the USB powered hub which will lead to crashes...

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jborkl
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October 21, 2012, 03:41:54 PM
 #38

New ones have no fuses. I use a powered hub and 5v 1000 ma

I have no problem as I said earlier one it got past the bugs of xbmx5

CrazyGuy
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October 21, 2012, 04:48:29 PM
 #39

snipped the vc++ power from the USB connector on the board.
This way you will indeed not blow up the fuse but also prevents current leaked back into the board from the USB powered hub which will lead to crashes...
Why not just snip it in the USB cord?

ASICPuppy.net ASIC Mining Hardware and Accessories - 2Pacs in stock!
iongchun
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October 22, 2012, 12:39:46 PM
 #40

i have a pi and thought it would make a decent miner base......

But its not!

The Pi in its current state is a real bitch when it comes to USB connections. I hardly get a single Ztex board working there for a few hours. Then out of no reason the pi looses the device (including the hub) or freezes .....
A hard reset is then necessary to get it working again:/

Hi BR0KK,
Have you tried Raspbian "wheezy", the new recommended Debian based distribution optimized for RPi?
It seems more stable than Debian "squeeze", mining with BTCMiner on RPi for more than 1 days without hang is a new record to me  Smiley

I uploaded a version of BTCMiner with USB libraries compiled on Raspbian:
Latest released version: https://www.dropbox.com/s/qc1fcgy18dp7nf8/ZtexBTCMiner-120703-raspbian.jar
Test version: https://www.dropbox.com/s/i3boafmrvp5l886/ZtexBTCMiner-121017-raspbian.jar

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Namecoin: N5Tnt3JyMeizsoAFAZDr7CSxjzDtPSisK8
Mining with P2Pool. Graph. Blocks.
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