Core Duo Power Sapping Bug is Microsoft Issue

illusoryphoenix writes "A few weeks ago, Tom's Hardware noted a significant reduction in battery life of the Core Duo processors it tested when USB devices were inserted. Intel claimed that Microsoft had a bug in their USB drivers, while Tom's Hardware was unable to reproduce the same result for any of the other Pentium M microarchitecures. This issue has finally been publicly confirmed by Microsoft to be a USB driver problem which keeps the processor from entering advanced sleep states."

Comments

Tom's was wrong

[jamesl]

AnandTech has an in depth analysis. Like most things, the answer can't be found in a headline.
http://www.anandtech.com/mobile/showdoc.aspx?i=269 3/

We've spent almost the past two weeks performing non-stop battery life testing on five notebooks with up to 4 different USB devices, testing theories, trying to pinpoint exactly what causes this problem and testing Microsoft's fix. What follows is the process that we went through in our labs when faced with this strange bug.

Where's the new logo ?

[Potatomasher]

Intel with a dropped e ? That's so like 1970 to end of 2005.
Get with the times Slashdot.

Re:Oh My God!

[evilgrug]

"There's a driver glitch with brand new hardware!!! "

Actually it affects Pentium Ms as well, according to Anandtech.

"It's already been two weeks and they haven't fixed it yet!!"

Microsoft first identified the issue and published a Knowledgebase article July 12, 2005. That's a little more than 2 weeks.

In fact, the regedit quickfix they're recommending was also published on that date ... meaning they still haven't resolved it 7 months later.

Re:Oh My God!

[tpgp]

I know that you're joking, but I have to reply to the serious parts of your post.

There's a driver glitch with brand new hardware!!!

From the TFA

When a peripheral device was connected to a USB (universal serial bus) 2.0 port, the notebook's battery life plunged at a greater rate than would normally be expected from the use of a peripheral such as a mouse or storage key.

Nope, not new hardware. USB is not new. The core duos just made the problem more obvious.

It's already been two weeks and they haven't fixed it yet!!
From the TFA

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.

So, its actually been over six months and they haven't fixed it yet.

As usual, Microsoft waits for an issue to become public before bothering to fix it.

Re:Oh My God!

[cloudmaster]

From the TFA

Don't you mean "From the TFA article", or maybe "from the friggin' TFA article"? :)

FYI information, this post is courtesy of Windows XP, based on NT technology, and transimtted using NIC card features to get the message posted as ASAP as possible.

just becuase I've nothing more to contribute (except that Tom's Hardware sucks)

Re:It's not just Microsoft...

[Odin's Raven]

Inexperienced hot-pluggers often feel this way. First, and most importantly - there's absolutely nothing wrong with you - you are hot-pluggable. Don't let a bad initial experience convince you otherwise.

The realy problem here is with technique - jabbing is never recommended. You want to firmly grasp the peripheral near its end, then gently slide it into the port. Okay, try that a few times - firm grasp - good! - and gennnntly slide it in. Now withdraw the device, and gennnntly reinsert. In and out, in and out, over and over and over again. Excellent, now you're getting the hang of it.

Although it's sometimes normal to encounter resistance inserting a peripheral into a brand-new port, this friction should disappear with use. Be extra-gentle in these circumstances, and resist the urge to just jab a device into the slot. Again, slow and easy, gently sliding in and out. Yes...yessssss! Getting frustrated and randomly jabbing with your peripheral is unlikely to result in a successful connection, and can damage your peripheral unit or the slot. Overly forceful insertions have even caused the tip of a device to snap clean off - don't let this happen to you!

Deep sleep is a separate issue. It's normal not to sleep immediately after a peripheral is inserted - the unit is in active use, and sleeping would be undesirable. Wait until interactions with the device have ceased before entering sleep.

Hopefully this has cleared up some of your concerns. Remember that hot-plugging is a perfectly normal activity, one which anyone can learn to enjoy with a little practice.