Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9

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From	Claudio Kuenzler <ck@claudiokuenzler.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9
Date	Fri, 22 Oct 2021 08:10:02 +0200
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References	<CViLv-27l-1@gated-at.bofh.it> <CVDPX-6mM-1@gated-at.bofh.it> <CV5lf-29Q-1@gated-at.bofh.it> <DaBVU-89A-1@gated-at.bofh.it> <DaVrz-3ms-1@gated-at.bofh.it> <DaVKV-3tf-1@gated-at.bofh.it> <CV5lf-29Q-1@gated-at.bofh.it> <DaVKV-3tf-1@gated-at.bofh.it>
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Cross-posted to 2 groups.

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The fact that a later Kernel versions work fine _could_ be because of a
hpwdt commit after 5.10:
https://github.com/torvalds/linux/commit/acc195bd2cc48445ea35d00036d8c0afcc4fcc9c#diff-994ee4b010b5c6222ad7a20e160f733401f46894b36fa3e1fb6ffbb48bedb817
I have not tested sid or a newer Kernel on our HP machines though.
If you've compiled your own Kernel and this one works (did your do a
multiple reboot test?), maybe there's a difference in the Kernel "config"?

What happens if you disable the hpwdt module as mentioned in the other bug
reports? Does Bullseye with 5.10 and experimental with 5.14 work in this
case?

Thread

Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9 YunQiang Su <wzssyqa@gmail.com> - 2021-09-08 15:00 +0200
  Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9 suyunqiang <wzssyqa@icloud.com> - 2021-09-09 05:50 +0200
  Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9 YunQiang Su <wzssyqa@gmail.com> - 2021-09-10 03:50 +0200
  Bug#993948: marked as done (kernel/amd64: system hang on HPE  ProLiant BL460c Gen9) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-09-26 00:10 +0200
  Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9 Yunqiang Su <wzssyqa@gmail.com> - 2021-10-21 10:50 +0200
    Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9 Claudio Kuenzler <ck@claudiokuenzler.com> - 2021-10-22 07:40 +0200
      Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9 YunQiang Su <wzssyqa@gmail.com> - 2021-10-22 08:00 +0200
        Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9 Claudio Kuenzler <ck@claudiokuenzler.com> - 2021-10-22 08:10 +0200
          Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9 YunQiang Su <wzssyqa@gmail.com> - 2021-10-22 16:40 +0200
            Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9 YunQiang Su <wzssyqa@gmail.com> - 2021-10-23 18:00 +0200

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