svn commit: r278473 - in head/sys: amd64/amd64 amd64/include amd64/vmm contrib/dev/acpica/include i386/i386 i386/include x86/acpica x86/include x86/x86 x86/xen
Koop Mast
kwm at rainbow-runner.nl
Mon Feb 16 14:21:23 UTC 2015
On 9-2-2015 22:00, Konstantin Belousov wrote:
> Author: kib
> Date: Mon Feb 9 21:00:56 2015
> New Revision: 278473
> URL: https://svnweb.freebsd.org/changeset/base/278473
>
> Log:
> Add x2APIC support. Enable it by default if CPU is capable. The
> hw.x2apic_enable tunable allows disabling it from the loader prompt.
Hi Konstantin,
This commit broke my Sandybridge laptop. If x2APIC is enabled the kernel
freezes after the
"ACPI APIC Table: <_ASUS_ NoteBook>" line is printed. I can't get much
information out of it since I couldn't get into the kernel debugger nor
has the machine a serial cable.
I did notice that "x2APIC" is listed in the CPU Features2 list, but for
the cpu's it reports "x2APIC: 0". I don't know if this has to do with
disabled x2APIC or some hardware/bios issue?
-Koop
Verbose dmesg with x2APIC disabled:
https://people.freebsd.org/~kwm/dmesg-x2apic.txt
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