Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0

From	Thorsten Sperber <lists+debian@aero2k.de>
Newsgroups	linux.debian.bugs.dist, linux.kernel, linux.debian.kernel
Subject	Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0
Date	2025-09-22 19:40 +0200
Message-ID	<LxSG5-hmA3-1@gated-at.bofh.it> (permalink)
References	<LwibD-gg1L-3@gated-at.bofh.it> <LwiOl-ggwT-1@gated-at.bofh.it> <Ljo5b-7khn-1@gated-at.bofh.it> <LwiOl-ggwT-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 3 groups.

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Hi,

thanks for your help. It's been four days now, I'd say above average (last was five days) - and no crash yet. I'm going to wait at least until the weekend before naming a winner, but that's already looking pretty good.

Just to get things right: the machine stopped crashing fatally - I believe with the addition of intel_iommu=off. It starts flashing red, logs those errors in kernel buffer, but stays running. I'd like to backtrack that later on, maybe after the weekend, removing all params and seeing where things go. Unless you'd like me to test something else before that.

Best regards
Thorsten

On 9/18/25 10:57, Uwe Kleine-König wrote:
> 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

Thread

Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2025-09-18 10:30 +0200
  Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2025-09-18 11:10 +0200
    Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thorsten Sperber <lists+debian@aero2k.de> - 2025-09-22 19:40 +0200
      Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thomas Gleixner <tglx@linutronix.de> - 2025-09-23 12:40 +0200
        Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thorsten Sperber <lists+debian@aero2k.de> - 2025-09-24 19:30 +0200
          Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thomas Gleixner <tglx@linutronix.de> - 2025-09-25 00:20 +0200
            Bug#1111027: NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0 Thorsten Sperber <lists+debian@aero2k.de> - 2025-09-25 17:30 +0200

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