[Bug 1825402] Re: Regression. Recent updates to cosmic broke hybrid-sleep

[Sergio Callegari]

Trying to downgrade systemd seems to be impossible. As soon as I try an
apt install --reinstall systemd=<some version> apt tries to remove half
of the system...

I have noticed the issue in the past 15 days, I think, but only had time
to look at it more closely right now.

Some notes:

- Trying to upgrade the kernel to latest 5.0.x via the mainline ppa seems to make no difference.
- Issue is somehow erratic. Happens like 70% of the time. In some rare occasions the systems seems to save state and then suspend correctly.
- When the issue occurs, the beginning of the hybrid sleep seems OK: big activity on disk to save the state, then the disk is powered down. However at this point, rather than suspending the system re-spins up the disk a couple of times and then halts.
System logs show a HuHu unexpected nmi, dazed and confused, but it is unclear to me if it is related to the broken suspend
- Plain suspend and plain hybernate seem to work.
- Hybrid suspend has worked for years on this 2013 Haswell laptop, which is a Shenker, in fact a Clevo, substantially identical to the System 76 Galago UltraPro.

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https://bugs.launchpad.net/bugs/1825402

Title:
  Regression. Recent updates to cosmic broke hybrid-sleep

Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  Recently, hybrid-sleep has been broken on cosmic.

  Calling systemctl hybrid-sleep used to work perfectly on my system.
  Now, after having saved the state to disk, it switches off the machine
  rather than suspending it.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: systemd 239-7ubuntu10.13
  ProcVersionSignature: Ubuntu 4.18.0-17.18-generic 4.18.20
  Uname: Linux 4.18.0-17-generic x86_64
  ApportVersion: 2.20.10-0ubuntu13.2
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Thu Apr 18 19:25:05 2019
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-12-12 (1952 days ago)
  InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Notebook W740SU
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-17-generic root=/dev/mapper/zagar_ssd--vg-root ro quiet splash resume=/dev/zagar_ssd-vg/swap_1 acpi_backlight=vendor
  SourcePackage: systemd
  UpgradeStatus: Upgraded to cosmic on 2019-01-18 (90 days ago)
  dmi.bios.date: 10/02/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.5
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: W740SU
  dmi.board.vendor: Notebook
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: Notebook
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd10/02/2013:svnNotebook:pnW740SU:pvrNotApplicable:rvnNotebook:rnW740SU:rvrNotApplicable:cvnNotebook:ct9:cvrN/A:
  dmi.product.family: Not Applicable
  dmi.product.name: W740SU
  dmi.product.sku: Not Applicable
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Notebook

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