[Bug 1725458] Re: System unbootable with root fs mounted ro after update to systemd 234-2ubuntu12 (from 234-2ubuntu10) on artful

[Markus Birth]

The change in the fstab seems to have worked only once. Today, it
doesn't boot again (with the changed fstab). I've tried switching from
UEFI to Legacy mode without luck, too.

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Title:
  System unbootable with root fs mounted ro after update to systemd
  234-2ubuntu12 (from 234-2ubuntu10) on artful

Status in systemd package in Ubuntu:
  New

Bug description:
  After not touching my notebook since 30th September (where I did the
  dist-upgrade to artful and installed all available updates), I did all
  available updates today (20th October) and the system didn't boot
  after that.

  The last message I see is "Reached target Bluetooth". Before that,
  there are several failed services. GDM doesn't come up.

  After logging in on tty2, I saw that the root partition was mounted
  read-only. Inspecting the messages of e.g. systemd-resolved shows that
  it didn't start because of the read-only filesystem. After remounting
  it fw, I was able to restart the daemons and could also start GDM and
  login fine.

  My fstab shows:

  UUID=a936dbe9-5ab5-4272-aaae-d22030824373 /               ext4
  errors=remount-ro 0       1

  
  The UUID is correct as "mount / -o remount,rw" works fine. Booting with the previous kernel doesn't change anything.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: systemd 234-2ubuntu12
  ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
  Uname: Linux 4.13.0-16-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3
  Architecture: amd64
  Date: Fri Oct 20 21:46:36 2017
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2016-07-26 (451 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 04f3:2073 Elan Microelectronics Corp. 
   Bus 001 Device 003: ID 8087:0a2a Intel Corp. 
   Bus 001 Device 002: ID 1bcf:2c7d Sunplus Innovation Technology Inc. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: HP HP Spectre x360 Convertible
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic.efi.signed root=UUID=a936dbe9-5ab5-4272-aaae-d22030824373 ro text
  SourcePackage: systemd
  UpgradeStatus: Upgraded to artful on 2017-09-30 (20 days ago)
  dmi.bios.date: 09/28/2016
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F.43
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 81A1
  dmi.board.vendor: HP
  dmi.board.version: 33.76
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF.43:bd09/28/2016:svnHP:pnHPSpectrex360Convertible:pvr:rvnHP:rn81A1:rvr33.76:cvnHP:ct10:cvrChassisVersion:
  dmi.product.family: 103C_5335KV G=N L=CON B=HP S=SPT
  dmi.product.name: HP Spectre x360 Convertible
  dmi.sys.vendor: HP

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