[SOLVED] RPi1 upgrade error today.

[Nachteule]

Did you do a sudo apt-get update?

please run

Terminal

sudo apt-cache search libcec
libcec2 - USB CEC Adaptor communication Library (shared library)
cec-utils - libCEC communication Library (utility programs)
libcec - Meta package libCEC.
libcec-dev - libCEC communication Library (development files)
libcec3 - libCEC communication Library (shared library)
python-libcec - Python bindings for libCEC

Seems your /etc/apt/sources.list.d/xbian.list is broken