Хан I upgrade my Ubuntu 12.04 to 14.04 without any graphic драйвер issues?

Some days ago гve installed Ubuntu 14.04 LTS on my ноутбук. All went good except for в incompatibility between my видео card and the proprietary драйвер from AMD. гve в ATI/AMD Mobility HD 4570 and AMD Catalyst 13.10 is the last драйвер that supports my card on Ubuntu. For some reason this драйвер can't be installed on Ubuntu 14.04, so I revert to Ubuntu 12.04, and there гve not so much issues using the same драйвер. Have you any разрабатывает what happen if I upgrade my Ubuntu to 14.04, now? Could the installed драйвер не longer works in the upgrade process? I really like to upgrade to в newer версия, вызвал I can't использовал the latest releases of some программное обеспечение I need to work with.

Thanks in advance