Hello Folks,

I'm running cgminer 3.0.1 on Ubuntu 12.04 with AMD APP SDK 2.4.  I'm using whatever proprietary driver installs by default with either a 5450 or 6850 video card.

I have in the recent past been able to successfully use the 5450 and the above software with Slush's pool.  Although rather unimpressive at a doddering 10MHash/S, this setup does indeed work.  However, when i try this with the 6850 I have problems.

The basic problem is that although cgminer says the 6850 is humping along at about 190 MHash/S, neither Slush's pool or 50btc report any shares returned.  If I turn on debug mode while cgminer is executing, every few minutes I will see the following sequence of messages: "GPU 0 found something?" then "OCL NONCE nnnnnnnnnnnnn found in slot 0" then "GPU0 invalid nonce" and finally "Discarded cloned or rolled work."  I've been attempting to study the source code myself and have found where these messages are coming from, but do not presently understand the code well enough to solve my problem.

Although I saw the "invalid nonce" message long ago, I was hoping that given the bazillions of hashes that are being calculated, surely a handful of hardware errors would be of no concern.  However, I've since amended my guess such that this error sequence occurs when I should have a share ready to report, but something about it flunks a test, due to a hardware error.  Hence the entire share is no good and thus nothing is ever reported back to the pools I'm using.

Any insight about this would be greatly appreciated.

Hello,

I'm a n00b with mining and have been absolutely stumped with my substantial attempts to get a miner working reliably.  I've tried every magic recipe there is and have even read faqs, readmes, forums, and the fm, and they all have failed for one reason or another. Although I have in fact been able to get cgminer working with both a 5450 and a 6850 (at different times) and connected to a pool, in the past, my installation has been very fragile and prone to mysterious malfunctions.  Since the random-recipe approach is not working, it's time to understand this on a deeper level.  So I'd like to start a conversation about how to do this.  I'd also like to restrict this thread to Ubuntu and AMD since this seems to be very common and it's what I have readily available.  That said...

According to my understanding, the first step in doing any mining is to install the drivers for the video cards.  For this we have two choices:

1. An open-source "radeon" driver, which is what Ubuntu installs by default.

2. A closed-source proprietary driver, aka "Catalyst", which is available from developer.amd.com.

I'd like to hear some thoughts on:

A. The general tradeoffs of using the open-source drivers vs. the proprietary Catalyst drivers.

B. Specific combinations of Ubuntu and driver that you all have successfully working.  Also, the same that are known to be buggy.

Thanks in advance for your thoughts.



 

Thanks for the insight.  Can you elaborate upon what you mean by "execution price range?" 

If I set an order to buy 100 coins at the market price, for example, the exchange should find the lowest ask use it first to fill my order.   If my order is completely filled, then I can say that my order was executed _at_ the single ask price.  However, if my order is bigger than the ask, then the ask order will be consumed and the exchange should then find the next lowest ask, and so on, until my order is filled.  In this case my order has indeed executed over a price range.  Is this what you're talking about?

Suppose the highest bid is at $15 and the lowest ask is at $16.  I assume it is reasonable to expect to be able to set a new bid at $15.1 and a new ask at $15.9 ?  The spread between the bid and the ask is _not_ the "execution price range?"

Hello,

I'd like to ask what you folks consider reasonable and/or customary behavior in dealing with limit orders on an exchange.

Suppose there is a an ASK order for 1 Bitcoin at $15.

Then somebody submits a BID order for 1 Bitcoin at $16.

1. Do you think that the bidder who's willing to pay $16 should get a sugar deal and only pay $15?

2. Should the asker who's happy with $15 get a windfall of $16 instead?

3. Should the exchange software prevent the submission of the $16 Bid on the grounds that the best Ask is only $15 ?

Thanks in advance for your thoughts on this matter.

I think we will find that a major, if not the predominate use of BTC, will be as a store of value.  You know, the _other_ function of money.  Using BTC for ordinary and "legal" trade has a blizzard of intractable problems with no obvious (to me) benefit.  How is BTC better than Paypal if you plan to obey the "law" ?

On the other hand I very much enjoy having a store of value, the safety of which is subject only to my responsibility.  Its security is not subject to .gov edict and it will not be taxed, seized, capital controlled, or otherwise molested.  Wherever I am in human space, there is my money as well.

Although I think it would be foolish to pour lots of "real" money into BTC right now, over the long haul, millions of people putting a few thousands of dollars (or more) into this would easily generate the influx of fiat required to pump up the price to amazing levels.  Once people have put "real" money into this, they're going to be reluctant to liquidate at a loss and this will provide a resistant floor to panic.  Notice how well the prices at Tradehill have stabilized, despite the Mt. Gox attack.  During a panic, I will merely sit and watch and wait for the storm to pass, instead of running for the exits.

All of the recent Mt Gox/hacker hooplah is merely evolution in action.  When the weak are slaughtered the survivors will be much harder to attack.  Trial by fire.

非常感谢您对比特币交易感兴趣。我们会为您建立一个交易账户，并尽快的实现交易。同时，我想问您关于如何在交易中操作现金的意见。我们正在考虑在各大城市建立一个能与客户面对面服务的网络机构，以便更好的进行现金交易。请您告诉我您对我们建立网络机构的意见和其他的任何想法。非常感谢！
另外：最好您使用私人邮箱给我们发私人邮件，而不要在论坛使用公共邮箱。感谢您的参与！

He's hunkered down at Crystal Peak

I think most of what you just said can be boiled down to the "store-of-value" function of money.  Fiat money is busy dying and taking everybody's hard earned value with it.  Governments simply cannot be trusted around money.  That's why they so tenaciously try to ensure that anything to do with money flows through their system.  Commodities can serve as a store of value, but their physical presence attracts predators.  Plus, they are hard to preserve, appraise, and move around.

Bitcoins so neatly solves all these problems and I predict its greatest use, or at least its initial "killer app" is going to be as a store of value.  Anybody who buys into this is going to _expect_ that their stash retains at least the purchasing power of the fiat they traded.  Maybe that's wishful thinking, but that's common psychology nonetheless.  No matter what happens to the BTC ecosystem, unless it's 100% eradicated, the holders of the BTC will bring the system back to life, in order to recover their value.  You'd need a world-wide prison planet to snuff this.  Sure, that's the ambition of many politicos, but that's not going to happen.  And with BTC in our arsenals it's now a bit less likely than before.

我在做bitcoins，在中国市场进行交易

市场是仅限邀请。

如果你兴趣，请回信与我，我将邀请你。

Yes.  Because retaking our freedom and extending it globally is going to require breaking quite a few laws.  Stop paying your taxes, stop filing paperwork with the Enemy.  Stop participating in the Enemy's staged political show.  Disconnect from their system.  Remove your money from its banking system and store your savings in new forms of wealth.  Develop a support network in the underground economy.  The old system is disintegrating and a new one is growing in it's place.  Your new life will be as freeman or slave, the choice is yours.  Easier said than done?  Sure.  Better than life on your knees?  I say yes.

我是一个母语为英语的美国人，我将提供一对一英语通过QQ教学课程，为0.50英群/小时

Excellent idea!  I can no longer kill natives, own slaves, or beat my women.  Why is this last bastion of abusive behavior (government) still tolerated? 

Exactly.  Any sort of effort to weaken Bitcoin is a Devil's bargain with them that's doomed to fail.

Does anybody really think the CIA has any problem with fund transfers?  Don't you think they already have plenty of methods of doing that and that it's extremely unlikely that Bitcoin (with all due respect) has come up with something novel that surprises them and gives them some new capability that they simply don't have already?  Sounds farfetched to me.

To the extent that government agencies had anything to do with developing the software for the Internet, I suggest that 1) we can see how primitive and chronically insecure much of it is relative to the results of a blank-sheet effort today and 2) the government at the time had far less understanding of the consequences of the Internet.

My thinking is that the June invite is the opening act of their dance to get engaged with the people of this project in order to ultimately "persuade" them to provide some "backdoor" method of weakening the system so that it becomes ineffective as a defense against government.  Surely they have the source code and the ability to understand this 100% on their own.  Why even talk to Bitcoin people?

Here's a bargaining chip...

"If you want the power to find _real_ criminals who are using Bitcoin, then show us the _guarantee_ that merely _political_ crime such as tax evasion is exempt from any action by government."



 

There is zero chance governments are going to tolerate this once it grows beyond a certain scale.  Their power to tax and control your lives rests upon their iron grip on money and banking. Their squeals about "criminals" using this system divert your attention from the fact that tax resisters are also "criminals" in their mind.  Bitcoins, and other variations of this theme give people a chance to store value and transact business outside the government's control.  Governments will hate this and do everything they can to crush this.

Therefore this is a great idea.  Give Uncle Sam (and his inbred kin folk) all over the world, a big fat middle finger and keep on truckin'.  Crash the $, crash other fiat money, and maybe, just maybe, you'll achieve liberation.