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3.632 bytes |
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Document ID: LWIK-42SPEV |
TP 600,770,SelectaDock III - USB controller shows conflict after warm docking
Applicable to: World-Wide
SYMPTOM:
The USB Ports on the SelectaDock III (M/T3547-003) will be active after every other time the Thinkpad is hot-docked.
The USB port on the Port Replicator is OK to use all of the time and is not affected by the limitation described below.
USB IS NOT SUPPORTED with Hot Docking under OSR2 on the SelectaDock III (M/T 3547-003).
CONFIGURATION:
This is a limitation has been seen on the following systems while docked to the SelectaDock III docking station:
- Thinkpad 770 M/T 9548xxx & 9549xxx
- Thinkpad 600 M/T 2645xxx
The operating system being used is original preload of Windows 95 OSR2.
Process to see the symptom detailed above:
1. Use any ThinkPad 600 or 770/E/ED with the IBM Preload of Windows 95 OSR2.
2. Boot the ThinkPad while attached to the docking station and allow the system to automatically configure the device settings.
3. Check Device Manager and make sure that both the USB controllers on the system and the docking station are active and configured correctly.
4. Click on Start ==> Eject PC and warm undock the ThinkPad from the docking station.
5. Check Device Manager to ensure that the system is in the Standalone profile and that the system's USB device is active & configured properly.
6. Warm dock the ThinkPad and check Device Manager. The USB controller in the docking station will have the yellow exclamation point.
7. Repeat steps 4-6 again and the USB controller should now be configured properly again.
Root cause: USB Driver UHCD.SYS in Windows 95 OSR2 does not support Two USB Controller Systems.
SOLUTION:
According to Microsoft the solution is incorporated into the Windows 98 operating system.
WORK AROUND:
In order to eliminate the Yellow Explanation Point on the Intel 82371AB PCI to USB Universal Host Controller in Device manager, follow the procedure outlined below:
1. Click on Start ==> Eject PC.
2. Wait until the Dock change is completed to the Undocked condition.
4. Undock the system.
5. Redock the system and check Device Manager to ensure that the yellow exclamation point is no longer present.
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Search Keywords |
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Hint Category |
Input Devices, Windows 95 | |
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Date Created |
02-12-98 | |
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Last Updated |
26-01-99 | |
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Revision Date |
26-01-2000 | |
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Brand |
IBM ThinkPad | |
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Product Family |
ThinkPad 600, ThinkPad 600E, ThinkPad 770, ThinkPad 770E/ED, ThinkPad 770X, ThinkPad 770Z, ThinkPad Docking Stations | |
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Machine Type |
2645, 2646, 9548, 9549, 9544, 3547 | |
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Model |
Various | |
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TypeModel |
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Retain Tip (if applicable) |
Retain Tip# H165349 | |
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Reverse Doclinks |