package fontconfig-config 2.11.94-0ubuntu1 failed to install/upgrade: unable to securely remove '/etc/fonts/conf.avail/10-hinting-medium.conf.dpkg-new': Read-only file system

[davidnottingham]

Unknown.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: fontconfig-config 2.11.94-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia wl
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Fri Aug 19 21:58:23 2016
DuplicateSignature:
 package:fontconfig-config:2.11.94-0ubuntu1
 Unpacking libfontconfig1:i386 (2.11.94-0ubuntu1.1) over (2.11.94-0ubuntu1) ...
 dpkg: error processing archive /var/cache/apt/archives/libfontconfig1_2.11.94-0ubuntu1.1_i386.deb (--unpack):
  unable to securely remove '/usr/lib/i386-linux-gnu/libfontconfig.so.1.9.0.dpkg-new': Read-only file system
ErrorMessage: unable to securely remove '/etc/fonts/conf.avail/10-hinting-medium.conf.dpkg-new': Read-only file system
InstallationDate: Installed on 2016-05-14 (97 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: fontconfig
Title: package fontconfig-config 2.11.94-0ubuntu1 failed to install/upgrade: unable to securely remove '/etc/fonts/conf.avail/10-hinting-medium.conf.dpkg-new': Read-only file system
UpgradeStatus: No upgrade log present (probably fresh install)