Seeing the same behaviour on this 16.04 system: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.5 LTS Release: 16.04 Codename: xenial $ apt-cache policy update-manager update-manager: Installed: 1:16.04.13 Candidate: 1:16.04.13 Version table: *** 1:16.04.13 500 500 http://dk.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 500 http://dk.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages 100 /var/lib/dpkg/status 1:16.04.12 500 500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages 500 http://security.ubuntu.com/ubuntu xenial-security/main i386 Packages 1:16.04.3 500 500 http://dk.archive.ubuntu.com/ubuntu xenial/main amd64 Packages 500 http://dk.archive.ubuntu.com/ubuntu xenial/main i386 Packages $ apt list --upgradeable Listing... Done chromium-browser/xenial-updates,xenial-security 68.0.3440.106-0ubuntu0.16.04.1 amd64 [upgradable from: 68.0.3440.75-0ubuntu0.16.04.1] chromium-browser-l10n/xenial-updates,xenial-updates,xenial-security,xenial-security 68.0.3440.106-0ubuntu0.16.04.1 all [upgradable from: 68.0.3440.75-0ubuntu0.16.04.1] chromium-codecs-ffmpeg-extra/xenial-updates,xenial-security 68.0.3440.106-0ubuntu0.16.04.1 amd64 [upgradable from: 68.0.3440.75-0ubuntu0.16.04.1] flashplugin-installer/xenial-updates,xenial-security 30.0.0.154ubuntu0.16.04.1 amd64 [upgradable from: 30.0.0.134ubuntu0.16.04.1] gir1.2-javascriptcoregtk-4.0/xenial-updates,xenial-security 2.20.5-0ubuntu0.16.04.1 amd64 [upgradable from: 2.20.3-0ubuntu0.16.04.1] gir1.2-webkit2-4.0/xenial-updates,xenial-security 2.20.5-0ubuntu0.16.04.1 amd64 [upgradable from: 2.20.3-0ubuntu0.16.04.1] josm/unknown,unknown 1.5.svn14163 all [upgradable from: 1.5.svn14066] libapache2-mod-php/xenial,xenial 1:7.2+62+ubuntu16.04.1+deb.sury.org+3 all [upgradable from: 1:7.2+62+ubuntu16.04.1+deb.sury.org+1] libapache2-mod-php7.2/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] libjavascriptcoregtk-4.0-18/xenial-updates,xenial-security 2.20.5-0ubuntu0.16.04.1 amd64 [upgradable from: 2.20.3-0ubuntu0.16.04.1] libjavascriptcoregtk-4.0-dev/xenial-updates,xenial-security 2.20.5-0ubuntu0.16.04.1 amd64 [upgradable from: 2.20.3-0ubuntu0.16.04.1] libnss-myhostname/xenial-updates 229-4ubuntu21.4 amd64 [upgradable from: 229-4ubuntu21.2] libpam-systemd/xenial-updates 229-4ubuntu21.4 amd64 [upgradable from: 229-4ubuntu21.2] libpq5/xenial-updates,xenial-security 9.5.14-0ubuntu0.16.04 amd64 [upgradable from: 9.5.13-0ubuntu0.16.04] libsystemd-dev/xenial-updates 229-4ubuntu21.4 amd64 [upgradable from: 229-4ubuntu21.2] libsystemd0/xenial-updates 229-4ubuntu21.4 amd64 [upgradable from: 229-4ubuntu21.2] libudev-dev/xenial-updates 229-4ubuntu21.4 amd64 [upgradable from: 229-4ubuntu21.2] libudev1/xenial-updates 229-4ubuntu21.4 amd64 [upgradable from: 229-4ubuntu21.2] libwebkit2gtk-4.0-37/xenial-updates,xenial-security 2.20.5-0ubuntu0.16.04.1 amd64 [upgradable from: 2.20.3-0ubuntu0.16.04.1] libwebkit2gtk-4.0-37-gtk2/xenial-updates,xenial-security 2.20.5-0ubuntu0.16.04.1 amd64 [upgradable from: 2.20.3-0ubuntu0.16.04.1] libwebkit2gtk-4.0-dev/xenial-updates,xenial-security 2.20.5-0ubuntu0.16.04.1 amd64 [upgradable from: 2.20.3-0ubuntu0.16.04.1] php-cli/xenial,xenial 1:7.2+62+ubuntu16.04.1+deb.sury.org+3 all [upgradable from: 1:7.2+62+ubuntu16.04.1+deb.sury.org+1] php-common/xenial,xenial 1:62+ubuntu16.04.1+deb.sury.org+3 all [upgradable from: 1:62+ubuntu16.04.1+deb.sury.org+1] php-curl/xenial,xenial 1:7.2+62+ubuntu16.04.1+deb.sury.org+3 all [upgradable from: 1:7.2+62+ubuntu16.04.1+deb.sury.org+1] php-igbinary/xenial 2.0.7-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 2.0.6~rc1-1+ubuntu16.04.1+deb.sury.org+1] php-interbase/xenial,xenial 1:7.2+62+ubuntu16.04.1+deb.sury.org+3 all [upgradable from: 1:7.2+62+ubuntu16.04.1+deb.sury.org+1] php-mbstring/xenial,xenial 1:7.2+62+ubuntu16.04.1+deb.sury.org+3 all [upgradable from: 1:7.2+62+ubuntu16.04.1+deb.sury.org+1] php-mysql/xenial,xenial 1:7.2+62+ubuntu16.04.1+deb.sury.org+3 all [upgradable from: 1:7.2+62+ubuntu16.04.1+deb.sury.org+1] php-sqlite3/xenial,xenial 1:7.2+62+ubuntu16.04.1+deb.sury.org+3 all [upgradable from: 1:7.2+62+ubuntu16.04.1+deb.sury.org+1] php-xml/xenial,xenial 1:7.2+62+ubuntu16.04.1+deb.sury.org+3 all [upgradable from: 1:7.2+62+ubuntu16.04.1+deb.sury.org+1] php7.2-cli/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-common/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-curl/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-dev/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-interbase/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-json/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-mbstring/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-mysql/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-opcache/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-readline/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-sqlite3/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] php7.2-xml/xenial 7.2.9-1+ubuntu16.04.1+deb.sury.org+1 amd64 [upgradable from: 7.2.8-1+ubuntu16.04.1+deb.sury.org+1] postgresql-9.5/xenial-updates,xenial-security 9.5.14-0ubuntu0.16.04 amd64 [upgradable from: 9.5.13-0ubuntu0.16.04] postgresql-client-9.5/xenial-updates,xenial-security 9.5.14-0ubuntu0.16.04 amd64 [upgradable from: 9.5.13-0ubuntu0.16.04] postgresql-contrib-9.5/xenial-updates,xenial-security 9.5.14-0ubuntu0.16.04 amd64 [upgradable from: 9.5.13-0ubuntu0.16.04] squashfs-tools/xenial-updates 1:4.3-3ubuntu2.16.04.3 amd64 [upgradable from: 1:4.3-3ubuntu2.16.04.2] systemd/xenial-updates 229-4ubuntu21.4 amd64 [upgradable from: 229-4ubuntu21.2] systemd-sysv/xenial-updates 229-4ubuntu21.4 amd64 [upgradable from: 229-4ubuntu21.2] udev/xenial-updates 229-4ubuntu21.4 amd64 [upgradable from: 229-4ubuntu21.2] wpasupplicant/xenial-updates,xenial-security 2.4-0ubuntu6.3 amd64 [upgradable from: 2.4-0ubuntu6.2]