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From: Claude Buisson <clbuisson@orange.fr>
Subject: drm-[stable|next]-kmod and MAXCPU
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Date: Mon, 24 Sep 2018 15:24:19 +0200
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Hello,

I tried to switch an amd64 Ivy Bridge system (with STABLE-11 @ r338696), 
from drm2 in base to drm-stable-kmod (and also drm-next-kmod) in ports, 
after rebuilding the custom kernel without any drm/drm2 module.

I installed:

gpu-firmware-kmod-g20180825
drm-stable-kmod-g20180822

(and also tried:

drm-next-kmod-g20180822

with the same results)

Loading "by hand", by rc.conf, or by loader.conf

i915kms.ko

led to an immediate reboot.

I built a GENERIC kernel (without any drm/drm2 module), and everything 
was OK.

So I tried modifying the GENERIC kernel and came to that conclusion:

the drm-[stable|next]-kmod ports cannot be used with a kernel built with 
MAXCPU (at least not defined as 256)!!

I commented the MAXCPU line in my custom kernel definition, and got back 
a working system.

May be, the assumptions about kernels could be explicited for ports of 
this kind ??

Hoping being useful,

CBu