Irq Assignment Conflicts - Dell POWEREDGE C6105 Hardware Owner's Manual

10 Reconnect the system to the electrical outlet, and turn on the system
and attached peripherals.
If the problem persists, the processor is faulty. See "Getting Help" on
page 162.
11 Turn off the system and attached peripherals, and disconnect the
system from the electrical outlet.
12 Remove the system-board assembly. See "Removing a System-Board
Assembly" on page 68.
13 Replace processor 1 with processor 2. See "Installing a Processor" on
page 73.
14 Repeat step 9 through step 11.
If you have tested both the processors and the problem persists, the
system board is faulty. See "Getting Help" on page 162.

IRQ Assignment Conflicts

Most PCI devices can share an IRQ with another device, but they cannot
use an IRQ simultaneously. To avoid this type of conflict, see the
documentation for each PCI device for specific IRQ requirements.
Table 4-1. Assignment Specific IRQ Requirements
IRQ Assignment
Line
IRQ0 8254 timer
IRQ1 Keyboard controller
IRQ2 Cascade for IRQ9
IRQ3 Serial port
IRQ4 Serial port
IRQ5 Free
IRQ6 Free
IRQ7 USB controller
146 | Troubleshooting Your System
IRQ Assignment
Line
IRQ8 RTC
IRQ9 SCI
IRQ10 USB controller, NIC
IRQ11 VGA, USB controller
IRQ12 Mouse controller
IRQ13 Processor
IRQ14 Primary IDE controller
IRQ15 Secondary IDE controller