Mouse cursor disappears when over icons

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http://askubuntu.com – Recently downloaded Ubuntu. Mouse cursor disappears when hovering over icons - such as over the icons at system settings - or flash content of web pages -not always-. My system involves : Gigabyte z77 D3H motherboard MSI HD 7850 graphics card 27 ' monitor I realized there were available drivers for my graphics card, when I downloaded and installed the driver, the problem regarding the mouse cursor vanished however the screen size shrinked about a few inches - looks really ugly that way - , and there was a statement on the lower right corner stating something similar to " Not supported AMD/ (HowTos)