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Low-power


Review: Power Management on Linux, Part 1

04/11/2008  I
Relevance: 6.75
Power management on computers has three parts: selecting devices that are more power-efficient, tuning your systems to run more efficiently, and configuring systems to use less power during periods of inactivity. Servers, desktop machines, and laptops usually need different power management schemes; there isn't a one-size-fits-all.
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Ubuntu 8.04 vs. Windows Vista Power Usage

04/26/2008  IIIIIIIII
Relevance: 6.48
In Q4'07 we had looked at Ubuntu's power consumption with all of their Linux releases going back to Ubuntu 5.04. While Linux has improved in recent years when it comes to power efficiency and optimizations, more processes running on the desktop had canceled out any real power improvements. Following that article was a look at power consumption between Windows and Linux. We had used an old desktop system in that comparison and Ubuntu 7.10 was consuming the most power while idling but Fedora 8 Test 3 had consumed the least amount of power and had beat out both Windows XP and Vista. While using the desktop, however, both versions of Windows had consumed less power than Fedora and Ubuntu. With Ubuntu 8.04 LTS now available, we have decided to run another simple power comparison. This time we are using a Lenovo ThinkPad notebook and an AMD server as we see whether Ubuntu Hardy Heron or Microsoft Windows Vista consumes less power.
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Ubuntu 8.04 vs. Windows Vista Power Usage

04/25/2008  I
Relevance: 6.33
In Q4'07 we had looked at Ubuntu's power consumption with all of their Linux releases going back to Ubuntu 5.04. While Linux has improved in recent years when it comes to power efficiency and optimizations, more processes running on the desktop had canceled out any real power improvements. Following that article was a look at power consumption between Windows and Linux. We had used an old desktop system in that comparison and Ubuntu 7.10 was consuming the most power while idling but Fedora 8 Test 3 had consumed the least amount of power and had beat out both Windows XP and Vista. While using the desktop, however, both versions of Windows had consumed less power than Fedora and Ubuntu. With Ubuntu 8.04 LTS now available, we have decided to run another simple power comparison. This time we are using a Lenovo ThinkPad notebook and an AMD server as we see whether Ubuntu Hardy Heron or Microsoft Windows Vista consumes less power.
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Tutorial: Power Management on Linux, Part 2

04/17/2008  IIII
Relevance: 6.27
In part 1 of this series we learned how to measure how much power our systems are using, both hardware and software, and some tricks for reducing power usage without degrading performance. Today we're going to dive into the world of power management on laptops: ACPI, APM, hard disk spindowns, and spinups.
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Linux vs. Windows Power Usage

10/16/2007  IIIIII
Relevance: 6.24
Since publishing our Ubuntu power tests, where we had monitored the power consumption of the past six Ubuntu releases going back two years on a laptop, we've had repeated requests for a power comparison between Windows and different Linux distributions. Well, in this article are the first set of results from that testing. We've compared the power consumption of Microsoft Windows XP, Windows Vista, Fedora 7, and Ubuntu 7.10.
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Power monitoring and logging with Apcupsd and Cacti

09/05/2008  I
Relevance: 6.15
For some time I have been using the American Power Conversion (APC) uninterruptible power supply (UPS) daemon Apcupsd to interface my desktop computer with my APC Back-UPS ES 550. Available for Linux, Windows, Mac OS X, and Solaris 10, Apcupsd reliably warns me when the power goes out and gives me time to get my box properly shut down before data is lost, or does so automatically if I am not there to supervise.
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Tagan BZ 900W

03/18/2008  I
Relevance: 5.94
The last time we had looked at a Tagan power supply was last October when exploring the Tagan ITZ 1300W and comparing it to Thermaltake's ToughPower 1200W power supply. While most enthusiasts don't need power supplies in excess of 1,000 Watts, for those that do the ITZ 1300W did perform admirably but its voltage rails did fluctuate some, though it did have the "WOW" factor on its side thanks to the stunning paint job. Since then Tagan released a new power supply, which has a maximum power output of 900W, boasts six +12V rails, and is modular with LED indicators for each cable. This new power supply is the Tagan BZ 900W, and today we are reviewing it at Phoronix.
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Low-power Linux goes off-grid

12/09/2007  III
Relevance: 5.91
Living in Africa we have abundant sun, a power source we rarely consider when we buy yet another gadget. Along comes the Aleutia E1, an ultra low power computer setup that can be run from a roll up solar panel or a car battery and runs Puppy Linux.
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Pumpkin seeds to power mobile networks

10/12/2006  I
Relevance: 5.91
MTN, Ericsson and the GSM Association have set up a project in Nigeria to demonstrate the potential of using biofuels to power mobile network base stations in areas beyond the power grid in developing nations.
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Ibm Breaks Through 2,500 Linux Applications on Power Chips

12/04/2006  II
Relevance: 5.85
After years of putting in energy and money to get independent software vendors to support the Power platforms running Linux applications created by these ISVs, IBM says that it has broken through the 2,500 applications barrier with Linux on Power. That is a tripling of the installed base of Linux on Power applications in the past two years.
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