Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
libgl1-mesa-glx:i386 : Depends: libglapi-mesa:i386 (= 10.1.3-0ubuntu0.4)
unity-control-center : Depends: libcheese-gtk23 (>= 3.4.0) but it is not going to be installed
Depends: libcheese7 (>= 3.0.1) but it is not going to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
Tente resolver as dependências manualmente, por exemplo
apt-get install libcheese7
apt-get install libcheese-gtk23
apt-get install libglapi-mesa
Se isso não funcionar, tente usar o aptitude, já que sua resolução de dependência é mais eficiente que o apt-get
apt-get install aptitude && aptitude -f install <thing-it-failed-on>
Eu também estou tendo esse problema. Eu acho que é um erro de vapor. Mesmo quando eu reinstalei o Ubuntu 14.04. Espero que eles consertem isso em breve. Esta solução funciona no tempo médio?