[Bug 250193] Kernel panic loading DRM kmods

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250193

--- Comment #9 from Jason W. Bacon <[email protected]> ---
(In reply to Jason W. Bacon from comment #7)

I have to retract the claim that the binary drm-kmod packages were working on
my MacBook.  I'm sure I was using modesetting successfully after the fresh
install, but I did not confirm that it was using drm-kmod from ports.  It may
have failed to load it and later auto-loaded the legacy modules in
/boot/kernel.

Since running freebsd-update, neither driver is working and it's falling back
on scfb.

When trying to use the ati driver, there's a lot of chatter about Radeon in
Xorg.0.log, but it ultimately fails and falls back to scfb.  This may have been
the case before the upgrade as well.

Loading i915kms built from source causes the console to freeze during boot. 
The system is still operational and tapping the power button shuts down
gracefully.

At any rate, the scfb driver performs fine for my purposes.

I also wondered if we should generate packages for a new point release, just
for special cases like this.  Most of the 12.1 packages are fine on 12.2, but
maybe we could tag ports like drm-kmod* to build separately on new point
releases during the overlap period.  I'm not sure we have the means to
guarantee issues like this won't happen again in the future, so it would seem
prudent to have processes in-place to mitigate it.

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