Preparing to unpack .../dkms_2.2.0.3-1.1ubuntu5_all.deb ...
Unpacking dkms (2.2.0.3-1.1ubuntu5) ...
Selecting previously unselected package fglrx-core.
Preparing to unpack .../fglrx-core_2%3a14.201-0ubuntu2_amd64.deb ...
Unpacking fglrx-core (2:14.201-0ubuntu2) ...
dpkg: error processing archive /var/cache/apt/archives/fglrx-core_2%3a14.201-0ubuntu2_amd64.deb (--unpack):
 trying to overwrite '/etc/acpi/events/fglrx-ac-aticonfig', which is also in package fglrx 2:14.201-0ubuntu1