2.6.0: Disabling IRQ #9

When I run 2.60 on my PC with Tyan S2462 (AMD 762 MP) motherboard I allways get after some time the message "Disabling IRQ #9" and the following messages in the syslog :

Jan  8 20:30:44 emil3 kernel: irq 9: nobody cared!
Jan  8 20:30:44 emil3 kernel: Call Trace:
Jan  8 20:30:44 emil3 kernel:  [__report_bad_irq+42/144] __report_bad_irq
+0x2a/0
x90
Jan  8 20:30:44 emil3 kernel:  [<c010e8ca>] __report_bad_irq+0x2a/0x90
Jan  8 20:30:44 emil3 kernel:  [note_interrupt+149/192] note_interrupt
+0x95/0xc0
Jan  8 20:30:44 emil3 kernel:  [<c010e9e5>] note_interrupt+0x95/0xc0
Jan  8 20:30:44 emil3 kernel:  [do_IRQ+278/320] do_IRQ+0x116/0x140
Jan  8 20:30:44 emil3 kernel:  [<c010ec96>] do_IRQ+0x116/0x140
Jan  8 20:30:44 emil3 kernel:  [common_interrupt+24/32] common_interrupt
+0x18/0x
20
Jan  8 20:30:44 emil3 kernel:  [<c010ce1c>] common_interrupt+0x18/0x20
Jan  8 20:30:44 emil3 kernel:  [do_softirq+93/224] do_softirq+0x5d/0xe0
Jan  8 20:30:44 emil3 kernel:  [<c012c19d>] do_softirq+0x5d/0xe0
Jan  8 20:30:44 emil3 kernel:  [do_IRQ+285/320] do_IRQ+0x11d/0x140
Jan  8 20:30:44 emil3 kernel:  [<c010ec9d>] do_IRQ+0x11d/0x140
Jan  8 20:30:44 emil3 kernel:  [common_interrupt+24/32] common_interrupt
+0x18/0x
20
Jan  8 20:30:44 emil3 kernel:  [<c010ce1c>] common_interrupt+0x18/0x20
Jan  8 20:30:44 emil3 kernel:  [default_idle+0/64] default_idle+0x0/0x40
Jan  8 20:30:44 emil3 kernel:  [<c010a030>] default_idle+0x0/0x40
Jan  8 20:30:44 emil3 kernel:  [default_idle+41/64] default_idle+0x29/0x40
Jan  8 20:30:44 emil3 kernel:  [<c010a059>] default_idle+0x29/0x40
Jan  8 20:30:44 emil3 kernel:  [cpu_idle+52/80] cpu_idle+0x34/0x50
Jan  8 20:30:44 emil3 kernel:  [<c010a0e4>] cpu_idle+0x34/0x50
Jan  8 20:30:44 emil3 kernel:  [printk+393/416] printk+0x189/0x1a0
Jan  8 20:30:44 emil3 kernel:  [<c01288a9>] printk+0x189/0x1a0
Jan  8 20:30:44 emil3 kernel:
Jan  8 20:30:44 emil3 kernel: handlers:
Jan  8 20:30:44 emil3 kernel: [acpi_irq+0/22] (acpi_irq+0x0/0x16)
Jan  8 20:30:44 emil3 kernel: [<c01fb426>] (acpi_irq+0x0/0x16)
Jan  8 20:30:44 emil3 kernel: Disabling IRQ #9

What can I do to fix that problem ?

I have a similar thing on our Tyan Opteron board. It seems to be right after the initialisation of the AMD 8111 IDE controller:

AMD8111: IDE controller at PCI slot 0000:00:07.1 AMD8111: chipset revision 3 AMD8111: not 100% native mode: will probe irqs later ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx AMD8111: 0000:00:07.1 (rev 03) UDMA133 controller ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:pio, hdb:pio ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:pio, hdd:DMA irq 9: nobody cared! Call Trace: [<c010c86b>] __report_bad_irq+0x2b/0x90 [<c0383eb5>] acpi_irq+0xf/0x1a [<c010c964>] note_interrupt+0x64/0xa0 [<c010cc95>] do_IRQ+0x165/0x1a0 [<c0105000>] _stext+0x0/0x70 [<c010af0c>] common_interrupt+0x18/0x20

 [<c0108040>] default_idle+0x0/0x40
 [<c0105000>] _stext+0x0/0x70
 [<c010806f>] default_idle+0x2f/0x40
 [<c01080fb>] cpu_idle+0x3b/0x50
 [<c066e901>] start_kernel+0x1a1/0x1f0
 [<c066e4a0>] unknown_bootoption+0x0/0x100

handlers:
[<c0383ea6>] (acpi_irq+0x0/0x1a)
Disabling IRQ #9
hdd: ATAPI-CD ROM-DRIVE-52MAX, ATAPI CD/DVD-ROM drive ide1 at 0x170-0x177,0x376 on irq 15
hdd: ATAPI 52X CD-ROM drive, 128kB Cache, UDMA(33)