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Standby TVs Waste Electricity, How About ACPI?
twitter asks: "There's power management and there's standby, do you know the difference? The BBC is running story on how much electricity is wasted by TV standby mode. Thanks to the very useful EnergyStar program, I'd be the one in seven who thought they were saving electricity, with the standby button. I've been very happy with APM and hibernation on laptops, and want to do something similar with the desktops I use. What's the state of APM / ACPI Wake-on-LAN for Linux these days?" Slashdot touched on this issue, earlier in the week, but that article was more on TVs, not on computer power saving technologies.
Okay... Suppose it costs an extra $10 for the battery, smart circuitry to run it, design costs, etc etc. Suppose disabling the transformer for standby saves you 2W. Suppose it's on standby year-round. That's 8,760 hours, or 17.52 kWh. Say 8 cents per kWh, you're now saving $1.40 per year. It would take over seven years for you to make up the initial cost.
And say there are 100 million machines with your reduced power consumption. How many power stations does that save, with all the polution not being belched into the air?
Now lets say we look at other devices and repeat the exercise. Oh look, poisonous emissions are going down, respitory health proplems are down, medical bills are down, medical insurance (for those countries with retarted health care like ours) are down (nah, maybe not this one).
Meanwhile we're filling the landfills and oceans with dinky little transformer-saving batteries.
You will save far more energy by investing in some compact flourescent light bulbs.
...servers run 24x365.25 no need for ACPI here.
Save power somwhere else...
The standby circuitry in most devices could probably run for days on the charge in a $1.50 capacitor.
I'm an electrical engineer, and no, it can't. That's why there is a transformer. The real solution would be to get off your lazy ass and hit the power switch when you are done watching instead of turning the TV off with the remote. The other solution is to put in a very high-efficiency switching power supply, but those are very expensive.
There is a good reason why Java never became particularly popular, and this is it. It has an absolutely idiotic security model, in that it prohibits you from doing "dangerous" or "nonportable" things. Where "dangerous" or "nonportable" actually means "useful".
With the appropriate privileges, Perl (or any other native application) can send any type of packets, layer 2 or above (possibly even layer 1). A programming language is NOT the place to impose security constraints. That's what the operating system is for.
Since perl scripts running on a Linux machine have access to the commandline, yes, they can send raw ethernet packages, given they run with the correct privileges and availability of correct tools. No native capability in perl for doing this is required at all. When running natively compiled JAVA on the same platform, and giving it access to the commandline, you'd have the exact same situation.
Yeah, because those damn environmentalists wield so much power and have so much money, why they're practically running the US government!
That's nonsense. Slashdot ran an article on this just recently. Global wind power in class 3 areas alone could generate 72 terawatts which is 60 times global consumption. Class 3 wind turbines are financially comparable to brown coal. North America has the greatest number of class 3 areas in the world.
But let's not stop at wind power. A home with solar panels for hot water (not the expensive, dirty and inefficient photovoltaic) saves 50% on heating costs. The panels pay for themselves in 5 years and have a 25 year lifetime. They are maintenance free (they are effectively just black plastic pipes behind glass sheets) and easy to repair when damaged (simple plumbing that a home handyman could do).
But let's not stop at solar and wind power. Changing your light bulbs from incandescent to energy efficient flouros will save 75% on lighting costs. Modern flouros are compact, come in a variety of shapes, only need to be changed once every 5-10 years, degrade slowly rather than blowing suddenly at inconvenient times, and have equivalent candela output to a 75W incandescent.
But let's not stop at solar power and wind power and energy efficiency. Your SUV gets 10MPG yet a comfortable Subaru Legacy has equivalent seating and storage but gets 33MPG. Your average driver will save between $750 and $1250 per year while simultaneously slashing their automobile oil consumption by two thirds. That's financially sensible and enviromentally friendlier.
The solutions are here right now. You need to stop waiting for the magic silver bullet like fusion, or blaming "environmentalists" for preventing fission, or wondering why you're spending $2000+ per year on fuel for your gargantuan SUV, and simply start using the technology that is here right now and is economical right now and is practical right now. You can make the difference right now.