[coreboot] IRQ 9 on s2895 and s2892
Myles Watson
mylesgw at gmail.com
Tue Mar 10 21:32:41 CET 2009
I'm extracting this from a different thread hoping for more help :)
Thanks Rudolf for all the help so far.
This is the last "funny" snippet from a Linux boot log with ACPI enabled:
irq 9: nobody cared (try booting with the "irqpoll" option)
Pid: 0, comm: swapper Not tainted 2.6.27-11-generic #1
Call Trace:
<IRQ> [<ffffffff8029e8ab>] __report_bad_irq+0x2b/0x90
[<ffffffff8029ea47>] note_interrupt+0x137/0x170
[<ffffffff8029f1dd>] handle_fasteoi_irq+0xed/0x110
[<ffffffff80215b16>] do_IRQ+0x86/0x100
[<ffffffff80212f0e>] ret_from_intr+0x0/0x29
<EOI> [<ffffffff8022d236>] ? native_safe_halt+0x6/0x10
[<ffffffff805068ca>] ? atomic_notifier_call_chain+0x1a/0x20
[<ffffffff8021ac35>] ? default_idle+0x55/0x60
[<ffffffff80210e95>] ? cpu_idle+0x75/0x110
[<ffffffff804fe845>] ? start_secondary+0x97/0xc2
handlers:
[<ffffffff803d2b90>] (acpi_irq+0x0/0x2b)
Disabling IRQ #9
Freeing initrd memory: 8460k freed
audit: initializing netlink socket (disabled)
This IRQ is very active
>
> 9: 1 276 15 99709 IO-APIC-fasteoi acpi
>
> Huh quite big number. Is it from coreboot or legacy BIOS?
It's from Coreboot.
Here's the same line from the factory BIOS:
9: 0 0 0 0
IO-APIC-fasteoi acpi
> Maybe some ACPI GP
> timer is generating the IRQ9?
How do you find an interrupt source that's going crazy like that?
When I boot with acpi=off I IRQ9 doesn't even get registered.
Thanks,
Myles
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