Learn about the technologies behind the Internet with The TCP/IP Guide!
NOTE: Using robot software to mass-download the site degrades the server and is prohibited. See here for more.
Find The PC Guide helpful? Please consider a donation to The PC Guide Tip Jar. Visa/MC/Paypal accepted.
View over 750 of my fine art photos any time for free at DesktopScenes.com!

[ The PC Guide | Troubleshooting and Repair Guide | The Troubleshooting Expert | Troubleshooting Specific Components | Troubleshooting the Motherboard and System Devices | System Bus, Resources and Expansion Cards ]

I have a PCI expansion card or video card that is supposed to support bus mastering, but I can't get bus mastering to work

Explanation: PCI bus mastering is supposed to be supported by a video or expansion card, but is not working properly. (Note that problems with IDE hard disk bus mastering is discussed in this section, not here.)

Diagnosis: Bus mastering problems are generally hard to diagnose, and often depend a great deal on the specific card. General problems with bus mastering can be related to the motherboard or BIOS settings.

Recommendation:

  • Consult the documentation for the peripheral card carefully. Usually the answer to the problem will be there somewhere.
  • Search your motherboard documentation for any hints as to whether all of your PCI slots support bus mastering, or only some of them. Some early and/or cheaper motherboards only supported bus mastering in some of their PCI slots, but not all of them.
  • Double-check all BIOS settings that are in the PCI / PnP settings group. Make sure that you are not disabling bus mastering, or assigning resources incorrectly to only ISA legacy cards.
  • You may have a resource conflict associated with the card..
  • Troubleshoot the expansion card.
  • Troubleshoot the motherboard.

Home  -  Search  -  Topics  -  Up

The PC Guide (http://www.PCGuide.com)
Site Version: 2.2.0 - Version Date: April 17, 2001
Copyright 1997-2004 Charles M. Kozierok. All Rights Reserved.

Not responsible for any loss resulting from the use of this site.
Please read the Site Guide before using this material.
Custom Search