[Bug 289220] Intel Xeon E5-2698 v4 X99 system will only boot with SMP disabled

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 01 Sep 2025 02:57:47 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289220

            Bug ID: 289220
           Summary: Intel Xeon E5-2698 v4 X99 system will only boot with
                    SMP disabled
           Product: Base System
           Version: Unspecified
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: sponix2ipfw@yahoo.com

Created attachment 263376
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=263376&action=edit
Linux inxi information

Intel Xeon E5-2698 v4 X99 system will only boot with SMP disabled in
/boot/loader.conf or using "safe mode" from the boot menu. I have confirmed
this on 14.2-RELEASE 14.3-RELEASE and 15-CURRENT (PRERELEASE). I have a spare
SSD in this system, so I can install and do whatever is needed to collect more
information and get this fixed. I also have another processor that I am pretty
sure will work with FreeBSD in this same system with SMP enabled.

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