just upgraded my Kubuntu from 13.10 to 14.04 LTS and lost all plugins. Found out that "python-qgis-common" is not installed.
Tried to install it but was told that it depends on "sip-api-10.1" which cannot be installed. Searched the web and according to almost all ubuntu sites the "sip-api-10.1" is virtual package provided by "python-sip" which is installed (sip4 (4.15.5-1build1) trusty).
BTW, I also had problem with libspatialite3 - had to find libspatialite3_3.1.0~rc2-2_i386 on launchpad and manually install it.
Have 32bit Kubuntu, use standard QGIS repos:
and have absolutely no idea what is wrong. I also performed autoclean after distro upgrade.
Do you know any solution of this situation?