Microsoft KB Archive/121849

= ATI Video Fails with Adaptec 174x SCSI Driver Present =

Article ID: 121849

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Advanced Server 3.1
 * Microsoft Windows NT Workstation 3.1
 * Microsoft Windows NT Advanced Server 3.1

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This article was previously published under Q121849



3.10

WINDOWS

kbnetwork kb3rdparty kbbug3.10 kbfix3.50



SYMPTOMS
A computer with an EISA bus running Windows NT version 3.1 may not be able to start the ATI video adapter driver (any type) with an Adaptec 174x adapter present, and the following messages may appear in the Event Viewer:

Event ID: 7026 Source: Service Control Manager Type: Error

Description: The following boot-start or system-start driver(s) failed to load: ATI

Event ID: 22 Source: ATI Type: Error

Description: A conflict has been detected between two drivers which claimed two overlapping IO port regions. Driver Aha 174x, with device <\Device\ScsiPort0.Translated>, claimed an IO port range with starting address in data address 0x28 and 0x2c, and length in data address 0x30.

Event ID: 22 Source: ATI Type: Error

Description: A conflict has been detected between two drivers which claimed two overlapping IO port regions. Driver ATI, with device <\Device\Video0.Translated>, claimed an IO port range with starting address in data address 0x28 and 0x2c, and length in data address 0x30.



CAUSE
This problem occurs due to the ATI adapter using EISA address space for its extended registers, thus conflicting with devices situated on or beyond slot 4 on the EISA bus.



RESOLUTION
To correct this problem, do one of the following:

- Place the Adaptec 174x SCSI adapter card on a slot other than slot 4; for example, slots 1 to 3.

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- Upgrade to Windows NT Workstation or Windows NT Server version 3.5.



STATUS
Microsoft has confirmed this to be a problem in Windows NT and Windows NT Advanced Server version 3.1. This problem has been corrected in Windows NT Workstation and Windows NT Server version 3.5.

The Adaptec and ATI products discussed here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Additional query words: prodnt 3.10 3.50

Keywords: KB121849

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