Microsoft KB Archive/159492

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PC Card Device Not Enumerated When Reinserted

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Q159492

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The information in this article applies to:


 * Microsoft Windows 95 OEM Service Release, version 2.0

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SYMPTOMS
When a PC Card device is removed from and then reinserted into a CardBus socket, the device may not be enumerated upon reinsertion. The PC Card icon on the taskbar shows a status of Empty.

CAUSE
The signal on certain CardBus status lines may be unstable for a time when a device is removed and reinserted. The Windows 95 drivers may read an incorrect status during this period of signal instability, and not detect the correct status of the device.

RESOLUTION
The reinserted device can be enumerated by clicking Refresh in Device Manager.

This issue is resolved by the following updated files for Windows 95 OSR2, and later versions of these files:

  CBSS.VXD    version 4.00.1114  dated 1/8/97   16,249 bytes PCCARD.VXD version 4.00.1114  dated 1/23/97  79,065 bytes PCI.VXD    version 4.00.1113  dated 1/13/97  44,379 bytes

STATUS
Microsoft has confirmed this to be a problem in Microsoft Windows 95 OEM Service Release 2 (OSR2). An update to address this problem is now available, but is not fully regression tested and should be applied only to computers experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time. Contact Microsoft Technical Support for additional information about the availability of this update.

This issue is resolved in Microsoft Windows 98.

MORE INFORMATION
For additional information about issues resolved by updates to these components, please see the following articles in the Microsoft Knowledge Base:

Q168909 Query/Remove Support for CardBus Cards Hangs Computer

Q166826 Data Read from ROM PC Card Device May Be Damaged

Q166400 Inserting SRAM Card into Docking Station May Hang Computer

Q164227 Second PC Card Not Recognized When Inserted in Dock

Q161994 Querying Powered-Off PC Card Modem Hangs Computer

Q159543 Intel ProShare PC Card May Hang Computer

Q159349 Resume On Ring Not Implemented for PC Card Modems

Q159348 No Windows 95 Support for Zoomed Video Devices

Q172652 Computer with USB Devices Hangs

Q164225 Poor Data Transfer with CardBus Card in Docking Station

Q164224 Inserting PC Card in Dock with CardBus Card May Cause Reboot

Q164223 PC Cards May Not Be Recognized in Docking Station

Q164222 CardBus Card in Docking Station May Not Be Configured

Q163938 Inserting Multifunction PC Card May Hang Computer

Q182591 CardBus Cards Not Enumerated on Some PC Card Controllers

Q173677 Audio Problems with Cirrus Logic PD6832 CardBus Controller

Q170324 CMD PCI-0646U Accessed in Compatibility Mode in OSR2

Q164873 PCI Device Not Configured and Resources Unassigned

For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base:

"Q161020 Implementing Windows 95 Updates" Additional query words: 95 toshiba tecra pcmcia

Keywords : kbhw osr2 win95

Issue type : kbprb

Technology : kbWin95search kbOPKSearch