Bug#990868: lenovo T460 Shutdown Problem

From	Bjørn Mork <bjorn@mork.no>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#990868: lenovo T460 Shutdown Problem
Date	2021-08-25 20:30 +0200
Message-ID	<CQ5OW-4Yj-5@gated-at.bofh.it> (permalink)
References	<Cz9OW-2qK-5@gated-at.bofh.it> <CQ5OW-4Yj-7@gated-at.bofh.it> <Cz9OW-2qK-5@gated-at.bofh.it> <CQ5OW-4Yj-7@gated-at.bofh.it>
Organization	m

Cross-posted to 2 groups.

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Faustin Lammler <faustin@fala.red> writes:

> Hi!
> I seem to have the same problem on my T460s and it is impossible to
> suspend the laptop (lid close or systemctl suspend).
>
> As far as I can remember, the problem appeared with kernel 5 branch (bpo
> on buster).
>
> At that time I did not wanted to open a bug report because I was not
> sure of my installation (dist-upgrade from buster, plus lots of bpo
> kernel installation and test) and I had found a workaround for the
> suspend problem, using those commands after reboot:
> | echo reboot >/sys/power/disk
> | echo disk >/sys/power/state
>
> Now I have a clean Debian 11 installation and both suspend and poweroff
> does not work anymore.

This sounds like https://bugs.debian.org/949020

Short version: Disable TPM 2.0 (select 1.2) i BIOS, or disable IOMMU by
booting with intel_iommu=off on the command line.


Bjørn

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Bug#990868: lenovo T460 Shutdown Problem Bjørn Mork <bjorn@mork.no> - 2021-08-25 20:30 +0200
  Bug#990868: lenovo T460 Shutdown Problem Faustin Lammler <faustin@fala.red> - 2021-08-25 21:40 +0200

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