https://bugzilla.kernel.org/show_bug.cgi?id=203617

--- Comment #21 from Rob ([email protected]) ---
(In reply to Zhang Rui from comment #20)
> (In reply to Rob from comment #16)
> > Someone else has identified the kernel commit that caused the change in
> ACPI
> > error reporting and has further narrowed down some of the causes for this
> > bug:
> > 
> can you show me where the following information is got?
> I'm wondering which specific commit introduces the regression, pci? or the
> thunderbolt driver?

dhedlund at https://github.com/dhedlund/kernel-patch-lg-gram-17 identified it
as 84c8b58ed3addf17d3beb2e5037b001ffa65c5ef
(https://github.com/torvalds/linux/commit/84c8b58ed3addf17d3beb2e5037b001ffa65c5ef).

Prior to that commit, these laptops are able to boot without ACPI errors.
dhedlund created a patch which can be applied to revert that commit, which gets
the current kernel to boot without ACPI errors.

> But it does not seem to be an ACPI problem anyway.

There appear to be two problems here: one is ACPI-related, the other is a
conflict with RTD3.

Disabling RTD3 allows us to boot without ACPI errors. However, the ACPI error
reporting system wasn't having this problem before
84c8b58ed3addf17d3beb2e5037b001ffa65c5ef, and it probably shouldn't be behaving
this way even with RTD3 support enabled.

Ultimately both causes probably need to be addressed. It seems likely that
future hardware updates might also trigger this ACPI error reporting bug. I
wish I could help more with this, but I'm not familiar enough with this area to
be useful.

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