[Bug 1771962] Re: hanging at boot for about 30 seconds since upgrade to bionic

[Steve Langasek]

I have run through the test case as described and confirmed that the
updated initramfs-tools in bionic-proposed eliminates this 30-second
wait in the initramfs.  In my test VM, the rootfs is now mounted at 6.8s
(and the swap is activated at 13.0s).

** Tags removed: verification-needed verification-needed-bionic
** Tags added: verification-done verification-done-bionic

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Title:
  hanging at boot for about 30 seconds since upgrade to bionic

Status in initramfs-tools package in Ubuntu:
  Fix Released
Status in initramfs-tools source package in Bionic:
  Fix Committed

Bug description:
  [SRU Justification]
  A regression in initramfs-tools causes it to autogenerate config in the initramfs saying to resume from any available swap devices, even if the swap device is ephemeral (i.e. swap encrypted with a random key).  This adds an inappropriate 30-second boot delay to any system with randomly-crypted swap, which includes any system that was installed with encrypted home directories in earlier releases.

  [Test case]
  1. Install the ecryptfs-utils package.
  2. Enable encrypted swap by running 'sudo ecryptfs-setup-swap'.
  3. Run 'update-initramfs -u' to regenerate the initramfs.
  4. Reboot.
  5. Verify that dmesg shows a 30-second delay before mounting the root filesystem.
  6. Install initramfs-tools from bionic-proposed.
  7. Reboot.
  8. Verify that dmesg no longer shows a 30-second delay before mounting the root filesystem.

  [Regression potential]
  This makes changes to shell scripts, and shell is a perilous language.  An unnoticed bug could cause all initramfs generation, and thus all kernel installation, to fail for some users.  A regression could also cause a user to lose hiberation support that they currently have.

  [Original description]
  Since upgrade to Bionic ubuntu is hanging at boot for about 30s. A `dmesg` shows

  ```
  [    3.407230] clocksource: Switched to clocksource tsc
  [   34.632583] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null)
  ```

  This is 100% reproducable and is always 30s minimum. I do not know in
  which package to report this properly – please excuse me.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.17
  ProcVersionSignature: Ubuntu 4.15.0-20.21-lowlatency 4.15.17
  Uname: Linux 4.15.0-20-lowlatency x86_64
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: i3
  Date: Fri May 18 09:40:59 2018
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-06-03 (1444 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to bionic on 2018-05-13 (5 days ago)
  VarLogDistupgradeAptclonesystemstate.tar.gz:
   Error: command ['pkexec', 'cat', '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'] failed with exit code 127: polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
   Error executing command as another user: Not authorized

   This incident has been reported.

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