My ubuntu18.04 Dell Vostro3546 is facing many problems relating to cursor jumping, repeated key typing and on-boot screen flickering. Please help me, I've been stuck for days and my work is on halt.
cursor-jumping : cursor jumps to start of line while typing and keep moving there, until I press ESC. Also, while reading pdf and on browsers the window automatically scrolls to the top. And it is not the because of touching the touchpad while typing.
repeated-key typing : When I type letters like 'c','z','v', etc it keepps typing '*'. Eg. c*****atc**h. Also, mouse/touchpad stops working after that.
Flickering on-boot : While booting, when screen shows ubuntu, the screen keeps flickering. And before the login window, it displays black screen with many system informations like mounting,GNOME, etc written in white.