Re: Acpi irq handler doesn't detect ICH4 sound device with ALSA. Is a known bug?

Bjorn Helgaas
2004-08-16T15:16:26Z

On Friday 13 August 2004 1:16 pm, Pere Castañer wrote:
> I upgraded my kernel from 2.6.5 to 2.6.7 and then with 2.6.8rc3 with acpi patch from 15th of July. With all these kernels the latest acpi code has problems to detect my onboard pci soundcard which uses snd-intel8x0m module (ICH4).
> When I try to load it manually I receive this message:
>
> -----------------------------------------------------------------
> ACPI: PCI interrupt 0000:00.1f.5[B] GSI 7 (level,low)----> IRQ7
> Intel ICH probe of 0000:00:1f.5 failed with error -16
> unable to grab IRQ7
> ----------------------------------------------------------------
>
> I suspect that ACPI has problems to handle the IRQ's at boot time. When I append to boot loader the string pci=noacpi the pci IRQ handler detects my soundcard nicely.
>
> PS:Is a Dell Inspiron 8500.
>
> PSS:Tested with kernel 2.6.8rc3 patched with acpi20040715-2.6.8rc2 patch.

Can you post the full dmesg and /proc/interrupts? The most likely
reason this failed is because snd_intel8x0_create() tried to attach
an ISR to IRQ7, but IRQ7 was previously claimed by some other driver
that is not willing to share.