linux-kernel - Re: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0

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Message-ID: <2pdp3kq4qebdxizprbnaq6omh4dvxdlktokvr37b7nlkf4po3b@fxzmgmi47wxx>
Date: Thu, 18 Sep 2025 10:57:58 +0200
From: Uwe Kleine-König <u.kleine-koenig@...libre.com>
To: Thorsten Sperber <lists+debian@...o2k.de>
Cc: 1111027@...s.debian.org, Thomas Gleixner <tglx@...utronix.de>, 
	"Rafael J. Wysocki" <rafael@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0

Hello Thorsten,

after writing the mail to Rafael Thomas provided the idea on irc to test
using

	intel_idle.max_cstate=2

(or =1 or =0) on the kernel command line given that the splat hints at
this happening for C3.

Can you please add this (with =2) to your bootloader and if the problem
happens again, tell us here and reduce the number further?

Best regards
Uwe

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