[Bug 267028] kernel panics when booting with ZFS and amdgpu.ko (both are required)

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

--- Comment #80 from George Mitchell <george@m5p.com> ---
Created attachment 240427
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=240427&action=edit
New version of the crash, from acpi_wmi

Here's another module that doesn't get along well with amdgpu.ko on my system:
acpi_wmi.ko.  Other than that this crash looks identical to all the earlier
ones, as far as I can tell.

It's been about a dozen boot-up tries since I put zfs_load="YES" into
/boot/loader.conf (so that ZFS gets loaded early to minimize its interaction
with amdgpu.ko) and vboxnet_enable="NO" in /etc/rc.conf (so that vboxnetflt.ko
doesn't get its chance to cause trouble either) until I got this new crash.

I'll mention again that this crash always happens within a minute of booting
up, or else never.  Anyone have any ideas about what acpi_wmi.ko has in common
with zfs.ko and vboxnetflt.ko?

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