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

[Markus Birth]

Public bug reported:

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

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful

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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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