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January 28, 2006

Microsoft driver flaw saps Intel Core Duo power

Posted by David Hunter at 12:03 PM ET.

Scott M. Fulton, III, Wolfgang Gruener, Harald Thon, and Bert Toepelt at TG Daily:

Connect any USB 2.0 device to your notebook and lose more than one hour of battery time: Tom’s Hardware Guide’s tests of a Windows-based Intel Core Duo mobile processor platform revealed a serious power consumption issue that, according to Intel, is caused by a Microsoft driver bug – a bug that has been known by Microsoft for some time, but kept from the public eye until today.

We spoke with representatives of major notebook computer manufacturers, all of whom asked us not to reveal their names, but all of whom said this particular issue has prevented their systems from achieving the goal of four to five hours of battery life which Intel had led them to expect.

The delicate issue about this bug, provided to Microsoft partners under confidentiality guidelines as Knowledge Base article KB899179, is the fact that it has been known to be a “problem” at least since 12 July 2005. It is unclear at this time why Microsoft has not issued a patch or an advisory the public to fix or explain this bug. So far, Microsoft has not responded to our inquiries and we are still waiting for a comment on this power drain issue.

It is apparently specific to the Intel Core Duo chipset and processor. Much more by following the link.



Filed under Hardware, Intel, OS - Client, Windows XP

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One Response to “Microsoft driver flaw saps Intel Core Duo power”

  1. Microsoft News Tracker » Microsoft confirms battery draining bug Says:

    [...] Microsoft has confirmed the battery draining bug that affects laptops with the Intel Core Duo chipset and processor. Tom Krazit has the details at CNET: Microsoft has confirmed the existence of a flaw in its USB 2.0 drivers for Windows XP Service Pack 2 that can cause a notebook to consume power at a faster-than-expected rate when using a peripheral device. … Microsoft published a Knowledge Base article on the subject in July 2005, but made that information available only to PC vendors and partners, a company representative said in a statement. The software maker is not releasing the article to the public, but a copy was posted on Slashdot that industry sources have confirmed was the original article. … In the private Knowledge Base article, Microsoft outlined a fix that involved modifying the registry key for USB 2.0. However, since then the company has realized that this is an impractical fix for most users, and is working on a new fix that could involve a BIOS update patch, a company representative said in a statement. [...]

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