Running on Ubuntu 14.04 with -v reveals the errors like:
/sbin/ldconfig: /usr/lib/mysql/libmysqlclient.so.16.0.0 is for unknown machine 40.
This causes empty cache file and non-working web admin panel because PHP fails to start (libmysqlclient.so.16.0.0 not found).
A solution would be to include older ldconfig from Ubuntu 12.04.
See http://forum.virt2real.ru/viewtopic.php?p=19920#p19920 for details.
Running on Ubuntu 14.04 with
-vreveals the errors like:/sbin/ldconfig: /usr/lib/mysql/libmysqlclient.so.16.0.0 is for unknown machine 40.This causes empty cache file and non-working web admin panel because PHP fails to start (libmysqlclient.so.16.0.0 not found).
A solution would be to include older ldconfig from Ubuntu 12.04.
See http://forum.virt2real.ru/viewtopic.php?p=19920#p19920 for details.