Notice that the 1394 Controller (labeled “Texas Instruments OHCI Compliant IEEE 1394
Host Controller”) is sharing IRQ 18 with another audio device labeled “Crystal
SoundFusion™ Audio Device.” Hence, both these devices are “stacked” on the same IRQ
setting (18). Often computers have multiple USB controllers, one of which may share an
IRQ with the computer’s FireWire hardware. IRQ stacking problems like these can cause
the FireWire hardware on your PC to malfunction, disrupting communication between
FireWire Card in the Digital X Bus.
For situations such as this, we recommend one of the following steps to correct the
problem:
Disable Device
The first course of action when attempting to resolve IRQ conflicts is to use the device
Disable/Enable function within Device Manager to turn off the (potentially) offending
device.
1. In Device Manager identify the device that is sharing an IRQ number with the
FireWire controller device.
2. Right-click that FireWire controller device and select <
Properties
> from the
pull-down menu.
3. Select <
Resources
> and take note of its IRQ Setting.
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