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Subject: [Bug 211548] [mps] Activating X2Apic Mode in BIOS results in
 "io_cmds_active is out of sync errors", won't boot
Date: Wed, 03 Aug 2016 13:43:41 +0000
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X-Bugzilla-Product: Base System
X-Bugzilla-Component: kern
X-Bugzilla-Version: 11.0-BETA3
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X-Bugzilla-Severity: Affects Some People
X-Bugzilla-Who: bcr@FreeBSD.org
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211548

            Bug ID: 211548
           Summary: [mps] Activating X2Apic Mode in BIOS results in
                    "io_cmds_active is out of sync errors", won't boot
           Product: Base System
           Version: 11.0-BETA3
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: bcr@FreeBSD.org
                CC: freebsd-amd64@FreeBSD.org
                CC: freebsd-amd64@FreeBSD.org

I'm installing FreeBSD (tried both 11-CURRENT, BETA-3) on a Dell C6320. Whe=
n I
activate X2Apic Mode in the processor settings in the BIOS and boot FreeBSD=
, I
get the following error:
http://people.freebsd.org/~bcr/mps0_error.jpg

Deactivating the X2Apic option in the BIOS lets FreeBSD boot normally and t=
he
mps0 controller can use the attached disks normally. I have several (12 in
total) systems like these, all exhibit the same behaviour.

I can provide more information on firmware versions and other details upon
request.

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