[Bug 267028] kernel panics when booting with both (zfs,ko or vboxnetflt,ko or acpi_wmi.ko) and amdgpu.ko

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267028

--- Comment #84 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to George Mitchell from comment #83)

I found the following text on https://cateee.net/lkddb/web-lkddb/ACPI_WMI.html
:

QUOTE
ACPI-WMI is a proprietary extension to ACPI to expose parts of the ACPI
firmware to userspace - this is done through various vendor defined methods and
data blocks in a PNP0C14 device, which are then made available for userspace to
call.

The implementation of this in Linux currently only exposes this to other kernel
space drivers.

This driver is a required dependency to build the firmware specific drivers
needed on many machines, including Acer and HP laptops.
END QUOTE

So, I expect that if acpi_wmi.ko is being loaded by FreeBSD, it may
well be a requirement for that machine to boot and/or operate via
ACPI. But I'm not familiar with the details.

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