Just updated to Kernel 3.12.5, and quickly reverted to 3.12.4.. Update:   the problem turned out to be a badly-timed coincidental update to MariaDB (5.5.34)..   Reverting to the previous version (5.5.33a) fixed the problem..    Now running 3.12.5.. With 3.12.5, Avahi mDNS failed, and – more importantly – MariaDB would not start: mariadb.service – MariaDB database server    Loaded: … Continue reading →