[Bug 1685984] Re: packages (multiple) failed to install/upgrade: unable to open 'xxxxx.dpkg-new': Operation not permitted

[Paulo Sequeira]

FYI, someone in a Sohos forum posted a workaround that can help relieve
some of the pain with the issues caused by the product until it's more
thoroughly diagnosed and addressed: adding pre & post rules to
temporarily deactivate the AV on-access scanner while updates take
place. Quoting from the forum post:

> I did this by creating the file /etc/apt/apt.conf.d/00sav-protect with
the contents:

DPkg::Pre-Invoke {
  "echo Stopping sav-protect...";
  "systemctl stop sav-protect.service";
  "echo Done";
};
DPkg::Post-Invoke {
  "echo Starting sav-protect...";
  "systemctl start sav-protect.service";
  "echo Done";
};

See https://community.sophos.com/products/server-protection-
integration/f/sophos-anti-virus-for-linux-basic/117256/sav-protect-
service-breaks-system-updates-on-ubuntu/425935#425935

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https://bugs.launchpad.net/bugs/1685984

Title:
  packages (multiple) failed to install/upgrade: unable to open 'xxxxx
  .dpkg-new': Operation not permitted

Status in dpkg package in Ubuntu:
  Confirmed

Bug description:
  Happening with VSCode install, linux-image-extra-4.8.0 and more.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.8.0-49-generic (not installed)
  ProcVersionSignature: Ubuntu 4.8.0-46.49~16.04.1-generic 4.8.17
  Uname: Linux 4.8.0-46-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  Date: Tue Apr 25 13:34:27 2017
  DuplicateSignature:
   package:linux-image-4.8.0-49-generic:(not installed)
   Unpacking linux-image-4.8.0-49-generic (4.8.0-49.52~16.04.1) ...
   dpkg: error processing archive /var/cache/apt/archives/linux-image-4.8.0-49-generic_4.8.0-49.52~16.04.1_amd64.deb (--unpack):
    unable to open '/boot/vmlinuz-4.8.0-49-generic.dpkg-new': Operation not permitted
  ErrorMessage: unable to open '/boot/vmlinuz-4.8.0-49-generic.dpkg-new': Operation not permitted
  InstallationDate: Installed on 2017-04-18 (6 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.1
   apt  1.2.19
  SourcePackage: linux-hwe
  Title: package linux-image-4.8.0-49-generic (not installed) failed to install/upgrade: unable to open '/boot/vmlinuz-4.8.0-49-generic.dpkg-new': Operation not permitted
  UpgradeStatus: No upgrade log present (probably fresh install)

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