linux-kernel - Re: Regression: unable to boot after commit bd9240a18edf ("x86/apic: Add TSC_DEADLINE quirk due to errata")

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Date:   Tue, 28 Nov 2017 13:36:07 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Zhang Rui <rui.zhang@...el.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>, linux-x86 <x86@...nel.org>,
        Len Brown <len.brown@...el.com>,
        "Chen, Yu C" <yu.c.chen@...el.com>
Subject: Re: Regression: unable to boot after commit bd9240a18edf ("x86/apic:
 Add TSC_DEADLINE quirk due to errata") - Surface Pro 4 SKL

On Tue, Nov 28, 2017 at 06:59:01PM +0800, Zhang Rui wrote:
> > > > > My Surface Pro 4 is unable to boot after 4.12. The symptom is

> yes. Tried 4.4 distro and 4.12 vanilla kernel, kernel always freezes
> with boot option "notscdeadline"/"lapic=notscdeadline".

Then for some mysterious reason, your Surface thing has a borked LAPIC.

No idea how or why..