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Active Protection Resume Suspend

IP.com Disclosure Number: IPCOM000032199D
Original Publication Date: 2004-Oct-26
Included in the Prior Art Database: 2004-Oct-26
Document File: 1 page(s) / 40K

Publishing Venue

IBM

Abstract

Hard drive failures are one of the leading warranty causes on laptops. Users should set power management policy to suspend on lid close as suspend parks the hard drive heads and prevents damage to hard drive during movement as actively running a system during movement is one of the leading causes of hard drive failure. However many users don't set suspend on lid close as users dock with lid close to run external display or time out of suspend is unacceptable. This article describes a method of achieving the quality improvements of suspend on lid close without the user inconveniences.

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Active Protection Resume Suspend

Hard drive failures are one of the leading warranty causes on laptops. Users should set power management policy to suspend on lid close as suspend parks the hard drive heads and prevents damage to hard drive during movement as actively running a system during movement is one of the leading causes of hard drive failure. Another failure when actively running the system on lid close is when someone places the laptop in a book bag or other place with limited air flow.

However many users don't set suspend on lid close for two reasons:

1) users dock with lid closed to run external display keyboard, therefore system needs to run with lid close
2) time to come out of suspend including reconnecting to network is not acceptable for some users

IBM ships laptops with an accelerometer This device can detect motion. If the user sets power management to be suspend on lid close, we don't do anything different than today.

If not we can take advantage of the accelerometer to solve the quality concern. The accelerometer is wired so it can be powered ON during suspend mode. As soon as the lid closes system BIOS starts checking the accelerometer As soon as motion is detected the system can than park the park hard drive head and place the system in suspend mode. The above now protects the laptop from damage during movement and still supports operation with lid close when laptop is stationary such as docked on a desktop. We also set lack of motion as a w...