CardBus Controller Displays Error Code 29 on IBM ThinkPad (185073)

SYMPTOMS

If you are using an IBM ThinkPad notebook computer, the CardBus Controller device may appear in Device Manager with an exclamation point in a yellow circle. When you view the properties of the CardBus Controller device, the following message may be displayed under Device STATUS

   The device has been disabled in the hardware. In order to use this
   device, you must re-enable the hardware. See your hardware
   documentation for details. (Code 29.)

In addition, PCI bus IRQ steering may be disabled, and the Use IRQ Steering check box may be unavailable on the IRQ Steering tab in Device Manager.

CAUSE

This issue can occur if both of the following conditions exist:

You are using one of the following IBM ThinkPad models:
- IBM ThinkPad 380XD
- IBM ThinkPad 560X
- IBM ThinkPad 770

You are using version 4.00.1120 or later of the Pci.vxd file.

NOTE: This issue may be dependent upon the version of your computer's BIOS or other hardware involved (for example, a docking station).

RESOLUTION

To resolve this issue, contact the computer manufacturer for information about a possible updated BIOS or another hardware-based solution.

To prevent this issue from occurring, do not install a version of the Pci.vxd file later than 4.00.1119.

MORE INFORMATION

For information about how to determine which Windows 95 updates are installed on a specific computer, please see the following articles in the Microsoft Knowledge Base:

161020 Implementing Windows 95 Updates

145990 Windows 95 Update Information Tool (Qfecheck.exe)

For additional information about PCI bus IRQ steering, please see the following article in the Microsoft Knowledge Base:

182604 Description of PCI Bus IRQ Steering

The third-party product discussed in this article is manufactured by a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.