###############################################################################
#
# consistant elements

#
# lspci -v
#

00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 74)
        Subsystem: VIA Technologies, Inc. VT6102 [Rhine II] Embeded Ethernet 
                   Controller on VT8235
        Flags: bus master, medium devsel, latency 64, IRQ 9
        I/O ports at 1800 [size=256]
        Memory at d0002c00 (32-bit, non-prefetchable) [size=256]
        Capabilities: <available only to root>


###############################################################################
# 
# normal operation
#   kernel parameters include pci=noacpi
#


#
# /var/log/messages
#
  Apr 27 08:03:16 laptop kernel: PCI: Sharing IRQ 9 with 0000:00:12.0


#
# cat /proc/interupts
#
           CPU0
  0:     102200          XT-PIC  timer
  1:        146          XT-PIC  i8042
  2:          0          XT-PIC  cascade
  8:          1          XT-PIC  rtc
  9:       2712          XT-PIC  uhci_hcd, eth0
 10:        178          XT-PIC  acpi, uhci_hcd, VIA8233
 11:          0          XT-PIC  uhci_hcd
 12:        588          XT-PIC  i8042
 14:       8752          XT-PIC  ide0
 15:        964          XT-PIC  ide1
NMI:          0
ERR:          0



###############################################################################
#
# next step, removed pci=noacpi from the kernel parameters
#


#
# errors which occured when bringing up my ethernet interface (shown above)
# when booted without pci=noacpi
#

eth0: Setting full-duplex based on MII #1 link partner capability of 45e1.
irq 9: nobody cared!
Call Trace:
 [<c010bb2a>] __report_bad_irq+0x2a/0x90
 [<c010bc1c>] note_interrupt+0x6c/0xb0
 [<c010c1a9>] do_IRQ+0x259/0x340
 [<c010c0de>] do_IRQ+0x18e/0x340
 [<c010a158>] common_interrupt+0x18/0x20
 [<c0210e1a>] acpi_processor_idle+0xd5/0x1c7
 [<c01070bc>] cpu_idle+0x2c/0x40
 [<c03c6701>] start_kernel+0x181/0x1c0
 [<c03c6430>] unknown_bootoption+0x0/0x120
 
handlers:
[<e0aad630>] (usb_hcd_irq+0x0/0x70 [usbcore])
[<e0958780>] (snd_via82xx_interrupt+0x0/0x400 [snd_via82xx])
Disabling IRQ #9

# 
# lspci -v is identical to the one above
#

# 
# cat /proc/interupts
#
           CPU0
  0:     323327          XT-PIC  timer
  1:       1223          XT-PIC  i8042
  2:          0          XT-PIC  cascade
  8:          1          XT-PIC  rtc
  9:     100000          XT-PIC  uhci_hcd, VIA8233
 10:       1227          XT-PIC  acpi, uhci_hcd
 11:          0          XT-PIC  uhci_hcd, eth0
 12:      25710          XT-PIC  i8042
 14:       7832          XT-PIC  ide0
 15:       5416          XT-PIC  ide1
NMI:          0
ERR:          0


###############################################################################
# 
# results
#

Notice that when allowing acpi to assign the irq's eth0 is on irq11, when 
turning of acpi for pci devices it is on irq 9.  The other device which is 
'off' is VIA8233 (should be 10, is put on 9 under acpi).