Messages in this thread | | | Subject | Re: Shared ACPI/USB IRQ working in 2.6 but not in 2.4 | From | Len Brown <> | Date | 07 Nov 2003 06:03:36 -0500 |
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The details of this issue are here:
http://bugzilla.kernel.org/show_bug.cgi?id=1283
Looks like the IOAPIC is in a different state in 2.4 and 2.6 before ACPI programs it. Also 2.6 has sis_apic_bug code that 2.4 does not -- though I don't know yet if it actually runs on this box.
cheers, -Len
On Thu, 2003-11-06 at 07:05, Marcelo Tosatti wrote: > Hi, > > David van Hoose started having problems with USB on 2.4.23-pre5. USB > device and acpi were now using irq 20: > > host/usb-ohci.c: USB OHCI at membase 0xe081a000, IRQ 20 > > /proc/interrupts: > > 20: 1 IO-APIC-level acpi, usb-ohci > > > Which makes the USB device not work. > > With -pre4 the USB device was using interrupt 9, because acpi failed to > find the correct IRQ: > > pci_irq-0302 [18] acpi_pci_irq_derive : Unable to derive IRQ for device 00:03.0 > PCI: No IRQ known for interrupt pin A of device 00:03.0 > host/usb-ohci.c: USB OHCI at membase 0xe081a000, IRQ 9 > > Now 2.6 assigns interrupt 20 to acpi and usb-ohci just like in > 2.4.23-pre5+, but the USB device works! > > Anyone has an idea why the interrupt sharing works with 2.6 but not with > 2.4? > > > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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