Microsoft have issued a patch that fixes a battery drain problem on ‘portable computers’ running Windows XP SP2.

Dailytech have reported it here and Microsoft give the details on this knowledgebase article here.
There’s no specific talk about VIA or UMPC’s on the MS posting but it could cover the USB-related CPU state problem we’ve seen on the Eo.

[Update: This has now been tested and it doesn't help on Eo's. Thanks Ctitanic for testing. His report is [url=http://ultramobilepc-tips.blogspot.com/2006/05/power-drain-fix-from-microsoft.html] here[/url]]

I know there are owners watching Origamiportal so please, if you’re reading this and you have an eo, try this patch and let us know if ‘perfmon’ reports C3 states on the VIA processor. Check your battery life in idle to. This fix has the potential to take an Eo from 1:20 to nearly 2hrs lifetime at idle.

Thanks to rainwalker for posting the info in the forums. Post your test results in his new thread [url=http://www.origamiportal.com/modules/newbb/viewtopic.php?topic_id=395&forum=7]here:[/url]