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Browse Prior Art Database

Preventing Adapter Power Down

IP.com Disclosure Number: IPCOM000032242D
Publication Date: 2004-Oct-26
Document File: 2 page(s) / 58K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for preventing a network adapter from automatically powering down when the link is brought down on Microsoft Windows 95®, 98® and Millennium® operating systems.

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Preventing Adapter Power Down

Disclosed is a method for preventing a network adapter from automatically powering down when the link is brought down on Microsoft Windows 95®, 98® and Millennium® operating systems.

Background

Currently, the Microsoft Windows 95®, 98® and Millennium® operating systems automatically power down a network adapter into a low power state if the link is lost for more than three seconds. This is a problem because a certain type of network diagnostic utility may be used for diagnosing network adapter problems on these operating systems, and it requires that

the network link is down for about 20 seconds on average. This causes the operating system to power down the network adapter to the lowest state possible. Once the OS puts the network adapter into a low power state, this causes all of the diagnostics to fail, and keeps the NDIS driver from properly reloading.

This automatic power-down feature is controlled by the operating system when ACPI is turned on, and cannot be shut off without disabling ACPI. When the diagnostics fail, the customer is likely to call customer support and possibly return their working network adapter, even if the adapter is not broken.

General Description

The first implementation for preventing the adapter from powering down adds an NDIS intermediate driver, which is loaded when the diagnostics are started and when the NDIS miniport driver is stopped (because the diagnostics have started). This intermediate driver interce...