my problem is my courser is blinking for any windows that refresh. for example right now each litter i write the courser blink for it , well it's acceptable now but imagine what happen when i open facebook (each picture , each simple element in the web page the courser blink for it) , please help me i really want to move to Ubuntu but problems keep get in my way and push me back to windows PC status : Core i5 , 4G ram , Nvidia optimus 310m , 500G HDD. Condition : it was working good with Ubuntu 13.04 but after the ugprade to 13.10 the problem apear and thanks in advance