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    SubjectRe: BUG: 2.4.18 & ALI15X3 DMA hang on boot
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    >> There seems to be some fundamental incompatibility between the kernel
    >> and the IDE chipset. On several kernels in the 2.4 series including
    >> 2.4.18, I observe a hang in the bootsequence at:
    >>
    >> ALI15X3: IDE controller on PCI bus 00 dev 78
    >> PCI: No IRQ known for interrupt pin A of device 00:0f.0. Please try using pc
    >i=biosirq.
    >> ALI15X3: chipset revision 195
    >> ALI15X3: not 100% native mode: will probe irqs later
    >> <hang>
    >
    >And does pci=bios help ?

    pci=biosirq doesn't help. Same failure mode.

    >The kernel can't find out how the IDE IRQ routing is happening.

    I haven't tried reserving IRQs in the bios (which is possible, but too
    much like blind search unless I get some more advice).

    -John
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