[Bug 1811447] Re: update-initramfs generates wrong RESUME if no swap + zram

[Mantas Kriaučiūnas]

This issue is fixed in Debian since July 2018 - initramfs-tools version
0.132, please accept this simple, 3 lines patch from Debian into Ubuntu
18.04 :

https://salsa.debian.org/kernel-team/initramfs-
tools/commit/312393b0cf1231125eeff3d1a2b6b778a935c21d

Look at bug #1781746 for more info.

** Bug watch added: Debian Bug tracker #861228
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=861228

** Also affects: initramfs-tools (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=861228
   Importance: Unknown
       Status: Unknown

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Title:
  update-initramfs generates wrong RESUME if no swap + zram

Status in initramfs-tools package in Ubuntu:
  Confirmed
Status in initramfs-tools package in Debian:
  Unknown

Bug description:
  On a system with swap disabled (removed from /etc/fstab) and package
  zram-config installed update-initramfs -u will emit something like
  following:

  I: The initramfs will attempt to resume from /dev/zram1
  I: (UUID=1d4b8573-7eee-43c9-a02a-10a65fc17b8a)
  I: Set the RESUME variable to override this.

  Obviously, resuming from zram device without actual non-volatile
  storage is not going to work. update-initramfs should be fixed to
  ignore /dev/zram* because otherwise the user must e.g. create file
  /etc/initramfs-tools/conf.d/resume-none with case-sensitive contents

  RESUME=none

  to workaround the issue, which may be a bit hard to guess from the
  above notice only.

  
  See also, somewhat related bug: 1781746

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: initramfs-tools 0.130ubuntu3.6
  ProcVersionSignature: Ubuntu 4.18.0-13.14~18.04.1-lowlatency 4.18.17
  Uname: Linux 4.18.0-13-lowlatency x86_64
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: amd64
  Date: Fri Jan 11 19:10:41 2019
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2019-01-05 (6 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  PackageArchitecture: all
  SourcePackage: initramfs-tools
  UpgradeStatus: No upgrade log present (probably fresh install)

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