apt - Cannot install any packages after update. Additional packages don't get included - Ask Ubuntu


there software update on 16.04 , after installing updates, can't install new packages easily. doesn't list out additional packages required anymore. example: 

 apt-get install skype       following packages have unmet dependencies:        skype : depends: skype-bin  apt-get install skype skype-bin       following packages have unmet dependencies:       skype-bin:i386 : depends: libqtgui4:i386 (>= 4:4.8.0) not going installed  apt-get install skype skype-bin libqtgui4:i386       following packages have unmet dependencies:       libqtwebkit4:i386 : depends: libqt4-opengl:i386 (>= 4:4.5.3) not going installed   it....

in past, when tried sudo apt-get install skype list additional packages.

and aptitude: (sometimes aptitude works fine, downloads needed)

 sudo aptitude install skype  following new packages installed:    libaudio2:i386{a} libdbusmenu-qt2:i386{a} libice6:i386{a} libmng2:i386{a}     libmysqlclient20:i386{a} libqt4-dbus:i386{a} libqt4-declarative:i386{a}     libqt4-network:i386{a} libqt4-opengl:i386{a} libqt4-script:i386{a}     libqt4-sql:i386{a} libqt4-sql-mysql:i386{a} libqt4-xml:i386{a}     libqt4-xmlpatterns:i386{a} libqtcore4:i386{a} libqtdbus4:i386{a}     libqtgui4:i386{a} libqtwebkit4:i386{a} libsm6:i386{a} lbuuid1:i386{ab}     libxss1:i386{a} libxt6:i386{a} libxv1:i386{a} mysql-common{a}     qt-at-spi:i386{a} skype skype-bin:i386{a} sni-qt:i386{a}   0 packages upgraded, 28 newly installed, 0 remove , 10 not upgraded.  need 41.9 mb/42.0 mb of archives. after unpacking 124 mb used.  following packages have unmet dependencies:   libuuid1 : breaks: libuuid1:i386 (!= 2.27.1-6ubuntu3.1) 2.27.1-6ubuntu3 installed.   libuuid1:i386 : breaks: libuuid1 (!= 2.27.1-6ubuntu3) 2.27.1-6ubuntu3.1 installed.  following actions resolve these dependencies:    keep following packages @ current version:  1)      libaudio2:i386 [not installed]                       2)      libdbusmenu-qt2:i386 [not installed]                 3)      libqt4-declarative:i386 [not installed]              4)      libqt4-opengl:i386 [not installed]                   5)      libqtgui4:i386 [not installed]                       6)      libqtwebkit4:i386 [not installed]                    7)      libsm6:i386 [not installed]                          8)      libuuid1:i386 [not installed]                        9)      libxt6:i386 [not installed]                          10)     qt-at-spi:i386 [not installed]                       11)     skype [not installed]                                12)     skype-bin:i386 [not installed]                       13)     sni-qt:i386 [not installed]                            leave following dependencies unresolved:           14)     skype-bin:i386 recommends sni-qt:i386                  accept solution? [y/n/q/?] y  no packages installed, upgraded, or removed.  0 packages upgraded, 0 newly installed, 0 remove , 10 not upgraded.  need 0 b of archives. after unpacking 0 b used.

no packages installed, upgraded, or removed. what?? why?

okay no instead of y , downgrade package.

 accept solution? [y/n/q/?] n  following actions resolve these dependencies:        downgrade following packages:                                 1)     libuuid1 [2.27.1-6ubuntu3.1 (now) -> 2.27.1-6ubuntu3 (xenial)]

now works, after downgrades downloads everything.

update: purged skype. seems sudo apt-get install skype -f works too. shouldn't default recommend/suggested package usual?


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