UMAX Technologies Astra 2000U User Manual
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4.
Click the + beside the Universal Serial Bus Controllers entry.
Two items display, (your chipset) PCI to USB Open Host
Controller and Root Hub.
If a yellow exclamation point appears, or if one or both of them are
not present, please contact your computer manufacturer. If the USB
section does not show up we recommend you contact your
computer manufacturer to enable USB.
Problem:
IRQ steering is disabled. For USB to function properly, IRQ
Steering must be enabled.
Solution:
The IRQ Steering setting is located in the Device Manager. Follow
the steps below to find out if the IRQ steering is enabled:
1.
Click on the “My Computer” icon using the right mouse button.
A pop-up menu appears.
2.
Click on Properties command using the left mouse button. This
brings up the Device Manager.
3.
In the Device Manager click the + symbol beside the System
Devices item.
4.
Double-click the PCI Bus to display the PCI Bus Properties.
5.
Click on the tab labeled IRQ Steering.
6.
The bottom half of this tab displays the IRQ Routing Status.
Look for the following items:
•
IRQ Routing enabled
•
IRQ read from (where it is read from)
•
IRQ Mini-port loaded successfully
•
IRQ Mini-port data processed successfully