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

Cross-posted to 2 groups.

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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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Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Lennert Van Alboom <lennert@vanalboom.org> - 2020-01-16 08:50 +0100
  Processed: Re: Bug#949020: linux-image-5.5.0-rc5-amd64:  Poweroff/suspend doesn't work in 5.5.0-rc5 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-04-17 11:30 +0200
  Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Uwe Kleine-König <uwe@kleine-koenig.org> - 2020-04-17 11:30 +0200
    Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Uwe Kleine-König <uwe@kleine-koenig.org> - 2020-04-18 13:30 +0200
      Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Uwe Kleine-König <uwe@kleine-koenig.org> - 2020-04-18 15:30 +0200
        Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Uwe Kleine-König <uwe@kleine-koenig.org> - 2020-04-19 00:50 +0200
          Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Lennert Van Alboom <lennert@vanalboom.org> - 2020-04-19 01:40 +0200
            Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Uwe Kleine-König <uwe@kleine-koenig.org> - 2020-04-19 16:00 +0200
              Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Lennert Van Alboom <lennert@vanalboom.org> - 2020-04-19 17:20 +0200
                Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Lennert Van Alboom <lennert@vanalboom.org> - 2020-04-21 15:10 +0200
                Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5 Uwe Kleine-König <uwe@kleine-koenig.org> - 2020-05-11 22:30 +0200
  Processed: Re: Bug#949020: linux-image-5.5.0-rc5-amd64:  Poweroff/suspend doesn't work in 5.5.0-rc5 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-05-11 22:30 +0200
  Bug#949020: linux-image-5.6.0-2-amd64: Lenovo poweroff/suspend failure Bjørn Mork <bjorn@mork.no> - 2020-06-25 14:30 +0200

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