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    SubjectRe: [REGRESSION] 4.17 failed to probe ACPI PnP
    On Tue, Jun 19, 2018 at 8:12 AM, Takashi Iwai <tiwai@suse.de> wrote:
    > Hi,
    >
    > there seems a regression regarding the probe of ACPI PnP devices.
    > The detailed logs are found in openSUSE bugzilla:
    > https://bugzilla.opensuse.org/show_bug.cgi?id=1098074

    But that's on this particular machine, not in general, right?

    At least I don't see this on any of the systems in my office.

    > In short, since 4.17, the laptop keyboard is lost on ASUS K501UW.
    > Comparing the kernel messages and other logs indicates that the
    > complete lost of ACPI PnP devices:
    >
    > On 4.16:
    > [ 0.390244] pnp: PnP ACPI: found 9 devices
    >
    > On 4.17:
    > [ 0.263266] pnp: PnP ACPI: found 0 devices
    >
    > ... and this leads to the failure of PS/2 keyboard detection due to
    > the missing PNP030b entry as a result.
    >
    > Any hints for debugging this are appreciated.

    It looks like this may be related to the ACPICA changes that went in
    during the 4.17 cycle.

    I would try 4.18-rc1 as there is an ACPICA fix in it that may be
    related to this in theory. If that doesn't help, I'd focus on the
    ACPICA changes.

    Thanks,
    Rafael

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