The following packages have been kept back: click click-dev gir1.2-click-0.4 libclick-0.4-0 0BUTIt's clear that all of these packages are either on hold somewhere, or are in some kind of conflict, or would cause conflict. I don't understand why or where. They are neither Locked in Synaptic, nor Held back by apt or aptitude.I am curious as to why these packages are held back? I cannot get past this with apt-get dist-upgrade, or with apt-get --with-new-pkgs upgrade.I am on Linux Mint 17.3.apt-cache policy click click-dev gir1.2-click-0.4 libclick-0.4-0:click:  Installed: 0.4.42+16.04.20151229-0~467~ubuntu14.04.1  Candidate: 0.4.43+16.04.20160203-0~606~ubuntu14.04.1  Version table:     0.4.43+16.04.20160203-0~606~ubuntu14.04.1 0        500 http://ppa.launchpad.net/ubuntu-sdk-team/ppa/ubuntu/ trusty/main amd64 Packages *** 0.4.42+16.04.20151229-0~467~ubuntu14.04.1 0        100 /var/lib/dpkg/status     0.4.21.1ubuntu0.2 0        500 http://mirror.vutbr.cz/ubuntu/archive/ trusty-updates/main amd64 Packages        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages     0.4.21.1 0        500 http://mirror.vutbr.cz/ubuntu/archive/ trusty/main amd64 Packagesclick-dev:  Installed: 0.4.42+16.04.20151229-0~467~ubuntu14.04.1  Candidate: 0.4.43+16.04.20160203-0~606~ubuntu14.04.1  Version table:     0.4.43+16.04.20160203-0~606~ubuntu14.04.1 0        500 http://ppa.launchpad.net/ubuntu-sdk-team/ppa/ubuntu/ trusty/main amd64 Packages *** 0.4.42+16.04.20151229-0~467~ubuntu14.04.1 0        100 /var/lib/dpkg/status     0.4.21.1ubuntu0.2 0        500 http://mirror.vutbr.cz/ubuntu/archive/ trusty-updates/main amd64 Packages        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages     0.4.21.1 0        500 http://mirror.vutbr.cz/ubuntu/archive/ trusty/main amd64 Packagesgir1.2-click-0.4:  Installed: 0.4.42+16.04.20151229-0~467~ubuntu14.04.1  Candidate: 0.4.43+16.04.20160203-0~606~ubuntu14.04.1  Version table:     0.4.43+16.04.20160203-0~606~ubuntu14.04.1 0        500 http://ppa.launchpad.net/ubuntu-sdk-team/ppa/ubuntu/ trusty/main amd64 Packages *** 0.4.42+16.04.20151229-0~467~ubuntu14.04.1 0        100 /var/lib/dpkg/status     0.4.21.1ubuntu0.2 0        500 http://mirror.vutbr.cz/ubuntu/archive/ trusty-updates/main amd64 Packages        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages     0.4.21.1 0        500 http://mirror.vutbr.cz/ubuntu/archive/ trusty/main amd64 Packageslibclick-0.4-0:  Installed: 0.4.42+16.04.20151229-0~467~ubuntu14.04.1  Candidate: 0.4.43+16.04.20160203-0~606~ubuntu14.04.1  Version table:     0.4.43+16.04.20160203-0~606~ubuntu14.04.1 0        500 http://ppa.launchpad.net/ubuntu-sdk-team/ppa/ubuntu/ trusty/main amd64 Packages *** 0.4.42+16.04.20151229-0~467~ubuntu14.04.1 0        100 /var/lib/dpkg/status     0.4.21.1ubuntu0.2 0        500 http://mirror.vutbr.cz/ubuntu/archive/ trusty-updates/main amd64 Packages        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages     0.4.21.1 0        500 http://mirror.vutbr.cz/ubuntu/archive/ trusty/main amd64 PackagesDEBUG:apt-get -o Debug::pkgProblemResolver=true install click click-dev gir1.2-click-0.4 libclick-0.4-0Reading package lists... DoneBuilding dependency tree       Reading state information... DoneStarting pkgProblemResolver with broken count: 0Starting 2 pkgProblemResolver with broken count: 0DoneThe following extra packages will be installed:  python3-click-packageSuggested packages:  ubuntu-app-launch-tools upstart-app-launch-toolsRecommended packages:  debootstrapThe following packages will be REMOVED:  python3-clickThe following NEW packages will be installed:  python3-click-packageThe following packages will be upgraded:  click click-dev gir1.2-click-0.4 libclick-0.4-04 upgraded, 1 newly installed, 1 to remove and 0 not upgraded.Need to get 146 kB of archives.After this operation, 1,024 B of additional disk space will be used.Do you want to continue? [Y/n] REPRODUCTION of the PROBLEM:apt-get dist-upgradeReading package lists... DoneBuilding dependency tree       Reading state information... DoneCalculating upgrade... DoneThe following packages have been kept back:  click click-dev gir1.2-click-0.4 libclick-0.4-00 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.AFTER FIX:apt-get install click click-dev gir1.2-click-0.4 libclick-0.4-0Reading package lists... DoneBuilding dependency tree       Reading state information... Doneclick-dev is already the newest version.click-dev set to manually installed.click is already the newest version.libclick-0.4-0 is already the newest version.libclick-0.4-0 set to manually installed.gir1.2-click-0.4 is already the newest version.gir1.2-click-0.4 set to manually installed.0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
The following packages have been kept back
debian;apt;aptitude;synaptic
According to the poster, the following command worksapt-get -o Debug::pkgProblemResolver=true install click click-dev gir1.2-click-0.4 libclick-0.4-0and gives the resultReading package lists... DoneBuilding dependency tree       Reading state information... DoneStarting pkgProblemResolver with broken count: 0Starting 2 pkgProblemResolver with broken count: 0DoneThe following extra packages will be installed:  python3-click-packageSuggested packages:  ubuntu-app-launch-tools upstart-app-launch-toolsRecommended packages:  debootstrapThe following packages will be REMOVED:  python3-clickThe following NEW packages will be installed:  python3-click-packageThe following packages will be upgraded:  click click-dev gir1.2-click-0.4 libclick-0.4-04 upgraded, 1 newly installed, 1 to remove and 0 not upgraded.Need to get 146 kB of archives.After this operation, 1,024 B of additional disk space will be used.Do you want to continue? [Y/n]So, no problem showed up when running an explicit apt-get install.I asked the poster to run it without the debug flag to see whether it gave the same results, but apparently he had already run the debug version.