"Dual Core" ACPI/USB 2.0 issues with Fix!.

Mysticales,

I agree. I will sticky this for the time being so this won't get lost.

Thanks for all the info guys, I am sure more people will be greatful for the research done here.

Thanks,

USAFdude

 

Now this looks much more promising than that Registry change. I hope everything will work fine after the update of the USB driver.

Cheers,

 

has anyone installed this yet? has it made a difference?

 

I ask the same question. Does this patch fix the issue?

 

Does this effect Windows Media Center Edition too or just standard XP.

 

MCE is XP So yes, all

 

Found the following:

The patch fixes faster-than-usual battery drains arising from the CPU's inability to enter Advanced Configuration and Power Interface (ACPI) processor idle sleep states as a result of the USB 2.0 driver leaving "the asynchronous scheduler component running continuously".

However, the patch doesn't prevent the USB host controller from finding itself unable to shut down when devices are removed from nested USB hubs, or when said controller is hooked up to USB 2.0 devices that make use of its periodic scheduler. Both instances can also cause the exceptional power drain, but neither are fixed by the patch.

And Microsoft also warns: "Various factors can affect the battery life of different portable computers that use different types of batteries. Therefore, you may not notice any improvement in battery life after you apply this update."

So looks like the issue is not completely solved...

 

Better then nothing at all.. makes you wonder if you should just not use 2.0 on DC..

Question is.. does this mean ANY USB device.. or just ones that utilize the 2.0?

Like a Gamepad.. would that drain battery too badly?

 

It says "Download the Update for Windows XP (KB918005) package..." on the MS link.

My question, is, is this download part of Windows update? I mean will my computer automatically download it and install it like it normally does for all other Windows updates? Or do I have to do it manually?

 

You have to download manually, since its not one of those critical security update