Bug#949020: linux-image-5.6.0-2-amd64: Lenovo poweroff/suspend failure

[Faustin Lammler]

Hi!

I have the exact same problem on a fresh Debian 11 installation and a
T460s laptop.

Changing TPM from 2.0 to 1.2 in the BIOS resolves the poweroff and the
suspend issue.

Also FYI (not sure if that helps), as I did not found 949020 earlier, I
have used the following workaround on Buster + 5.10 bpo kernel
(hibernating just after booting to then be able to suspend until next
reboot):
| echo reboot >/sys/power/disk
| echo disk >/sys/power/state

As far as I can remember, I did not had the poweroff problem on Buster,
just suspend.

-- 
Faustin


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Bug#949020: linux-image-5.6.0-2-amd64: Lenovo poweroff/suspend failure

[Bjørn Mork]

Package: src:linux
Followup-For: Bug #949020

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Just confirming that this issue is still present, causing a terrible
user experience when upgrading from Buster to Bullseye on a Lenovo
laptop. Verified on a 4th Gen Thinkpad X1 Carbon.

Setting intel_iommu=off is confirmed as workaround.

I understand from the upstream discussion that this is mostly a
Lenovo firmware issue.  But I still believe something needs to be
done in Debian to avoid every Lenovo user having to discover this
bug report and implement the workaround manually.  After first
experiencing a complete system failure when trying to suspend 
the system.  A feature which worked without a flaw on Debian
Buster.


- -- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (990, 'testing'), (700, 'stable'), (600, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, arm64

Kernel: Linux 5.6.0-2-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

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