[Bug 256389] [PATCH] acpi: Include Samsung laptops in the x2APIC Sandy Bridge blacklist

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From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 03 Jun 2021 19:48:20 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256389

--- Comment #3 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=37f780d3e0a2e8e4c64c526b6e7dc77ff6b91057

commit 37f780d3e0a2e8e4c64c526b6e7dc77ff6b91057
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2021-06-02 22:29:07 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2021-06-03 19:47:31 +0000

    Disable x2APIC for SandyBridge laptops with Samsung BIOS

    From the PR:
    Almost always, my Samsung RF511 laptop could not boot with
    x2APIC enabled in the kernel. It froze during SMP initialization,
    shortly after "ACPI APIC Table: <SECCSD LH43STAR>" was printed
    to the console. When the kernel is instructed not to use x2APIC,
    the system boots correctly.

    PR:     256389
    Submitted by:   David Sebek <dasebek@gmail.com>
    Reviewed by:    markj
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D30624

 sys/x86/acpica/madt.c | 1 +
 1 file changed, 1 insertion(+)

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