https://bugzilla.kernel.org/show_bug.cgi?id=16548





--- Comment #6 from Alex Chiang <achi...@canonical.com>  2010-08-18 14:42:26 ---
Roman, thanks for testing again.

btw, I think your bisection run was a little bit misleading. The initial crash
was this:

BUG: Unable to handle kernel NULL pointer dereference at 0x00000005
IP: [<c125b489>] apci_ns_lookup+0x125/0x57e

As you can see, that's not a part of my patch. I think what happened is that
the patch fixed the bad logic introduced by 5d554a7bb06, and we started
properly returning false on your machine, which revealed a latent bug somewhere
else in ACPI.

When you reverted my patch, we incorrectly returned true on your machine, thus
masking the symptoms of the buggy ACPI code, allowing your machine to boot.

In any case, it looks like your namespace is still broken, but at least you're
not crashing anymore.

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