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    SubjectRe: [Bug 41722] Clevo M5X0JE hangs in ACPI init
    On Thu, Jan 19, 2012 at 11:48:29AM -0800, Yinghai Lu wrote:
    > 2012/1/19 Rogério Brito <rbrito@ime.usp.br>:
    > >
    > > OK, now it seems that we are getting farther. The system boots, even
    > > mounts the root filesystem, udev starts and, then, when it seems that
    > > some USB messages are going to appear on the screen, the notebook
    > > crashes with the same distortion that happened before (with some of
    > > the last messages appearing being related to OHCI).
    >
    > in that case, Can you try to disable OHCI in .config
    >
    > CONFIG_USB_OHCI_HCD
    >
    > OHCI controller 00:0b.0 is using
    > Memory at b0004000 (32-bit, non-prefetchable) [size=4K]
    >
    > VGA controller 00:05.0
    > Memory at b2000000 (32-bit, non-prefetchable) [size=16M]
    > Memory at c0000000 (64-bit, prefetchable) [size=256M]
    > Memory at b1000000 (64-bit, non-prefetchable) [size=16M]
    > [virtual] Expansion ROM at 80000000 [disabled] [size=128K]
    >
    > it seems not related. or could be ioremap etc have problem?
    >
    > So can you try to boot with nopat?

    Yinghai/Bjorn,

    After carefully examination of the allocations done by the vanilla upstream
    kernel; the one without the 'skip transparent bridge while sizing' code,
    I find that the allocation to one of the Bar; BAR[16], of the CardBus Bridge at 05:07.0
    does not overlap that of the parent transparent bridge at 00:10.0

    Here is what I see in the video at
    http://www.youtube.com/watch?v=_dYhkWHfep0&feature=youtu.be

    [268.002554] pci 0000:05:07.0: Cardbus bridge to [bus 06-09]
    [269.002582] pci 0000:05:07.0: bridge window [io 0x1400-0x14ff]
    [270.009090] pci 0000:05:07.0: bridge window [io 0x1000-0x10ff]
    [271.012358] pci 0000:05:07.0: bridge window [mem 0x84000000-0x87ffffff pref]
    [272.015626] pci 0000:05:07.0: bridge window [mem 0x88000000-0x8bffffff]
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ offending allocation

    [273.018894] pci 0000:00:10.0: PCI bridge to [bus 05-06]
    [274.022162] pci 0000:00:10.0: bridge window [io 0x1000-0x1fff]
    [275.025430] pci 0000:00:10.0: bridge window [mem 0xb3200000-0xb32fffff]
    [276.028698] pci 0000:00:10.0: bridge window [mem 0xb8400000-0x87ffffff pref]


    To me, the issue seems to be that due to some reason the OS either fails to Or does not try to
    reallocate the addresses assigned to the the non-pref mem BAR of the the transparent bridge
    at 00:10.0.

    In any case since you have deeper knowledge in this area, I will let you verify my theory.
    RP

    >
    > Thanks
    >
    > Yinghai

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