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Bug#949020: linux-image-5.5.0-rc5-amd64: Poweroff/suspend doesn't work in 5.5.0-rc5

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Hello,

On Sat, Apr 18, 2020 at 03:18:35PM +0200, Uwe Kleine-König wrote:
> On Sat, Apr 18, 2020 at 01:22:26PM +0200, Uwe Kleine-König wrote:
> > On Fri, Apr 17, 2020 at 11:15:28AM +0200, Uwe Kleine-König wrote:
> > > Control: found -1 5.5.13-2
> > > 
> > > On Thu, Jan 16, 2020 at 08:39:44AM +0100, Lennert Van Alboom wrote:
> > > > Package: src:linux
> > > > Version: 5.5~rc5-1~exp1
> > > > Severity: normal
> > > > 
> > > > Neither shutdown nor suspend works in this kernel version. Systemd seems
> > > > to indicate it is trying at least, but the system hangs either right
> > > > before shutdown (clean situation, requiring a poweroff with the power
> > > > button) or before sleep (hung system, can't do anything except also hard
> > > > powering off and rebooting later).
> > > > 
> > > > Syslog from a suspend action:
> > > > 
> > > > Jan 16 06:43:53 Nesbitt NetworkManager[749]: <info>  [1579153433.6342] manager: sleep: sleep requested (sleeping: no  enabled: yes)
> > > > Jan 16 06:43:53 Nesbitt NetworkManager[749]: <info>  [1579153433.6343] device (p2p-dev-wlan0): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'managed')
> > > > Jan 16 06:43:53 Nesbitt NetworkManager[749]: <info>  [1579153433.6345] manager: NetworkManager state is now ASLEEP
> > > > Jan 16 06:43:53 Nesbitt systemd[1]: Reached target Sleep.
> > > > Jan 16 06:43:53 Nesbitt systemd[1]: Starting Suspend...
> > > > Jan 16 06:43:53 Nesbitt kernel: [55203.294410] PM: suspend entry (s2idle)
> > > > Jan 16 06:43:53 Nesbitt systemd-sleep[19110]: Suspending system...
> > > 
> > > I have the same problem with 5.5.13-2 on a Lenovo Thinkpad T460p, with
> > > 4.19 from buster there is no such problem. I didn't debug any further
> > > yet.
> > 
> > I just reconfirmed: linux-image-4.19.0-8-amd64 4.19.98-1 doesn't suffer
> > from this problem, but linux-image-5.6.0-trunk-amd64-unsigned
> > 5.6.4-1~exp1 has the same problem.
> 
> I started bisecting (but didn't complete yet, the weather is too good to
> sit inside :-). Currently I see
> 
> 	bad: 5.2.17-1+b1
> 	good: 5.2.6-1
> 

I checked the remaining versions in between the two above and the bisect
result is that

	5.2.7-1 is the last good; and
	5.2.9-1 is the first bad

kernel image. The relevant change between these two is:

	  * [x86] iommu: Enable INTEL_IOMMU_DEFAULT_ON (Closes: #934309)

. At least 5.2.7-1 shows the problematic behaviour when I add
"intel_iommu=on" on the kernel command line. I suspect I can boot newer
kernels with "intel_iommu=off", but didn't try that yet.

Related:

	https://bugzilla.kernel.org/show_bug.cgi?id=197029

@Lennert: I assume you can still reproduce the problem. Do you care to
test with intel_iommu=off and report about the result? Just to make sure
you and I see the same problems?

Best regards
Uwe

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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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