Re: HP Elitebook 840 G5 - acpi failure

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On Thu, Nov 18, 2021 at 1:43 PM Ian Kumlien <ian.kumlien@xxxxxxxxx> wrote:
>
> Hi,
>
> I started updating kernels to 5.14 a while ago and the laptop kept
> deadlocking, it's my work laptop so it's quite locked down wrt bios
> and bios updates....
>
> But, i have since tried with 5.15.2 and it still crashes...
>
> So the little testing i have is:
> acpi=off -> works
> acpi=ht -> *boom*

This need not mean that ACPI is the source of the problem, though.

> 5.13.x did work however and i know there was updates wrt to acpi in 5.14
>
> Older kernel oops can be found here:
> https://photos.app.goo.gl/ZygV5Ja39C7cQCR39

But the Oops is indeed related to ACPI.  It looks like the AML
interpreter is crashing when trying to execute the _OFF method of a
power resource.

> I'd basically just want to know what kind of information can I provide
> to help you to find and fix this issue?

Would you be able to collect a trace with dynamic debug in
drivers/acpi/power.c enabled, that is, add dyndbg="file power.c p+" to
the kernel command line before booting and capture an oops then?



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