okay folks. enough with the bad advice. this system was working okay, then something went bad, without a software update, thats hardware failure manifesting. advising the user to upgrade is like asking him to trade problems. each OS change comes with its own myriad of issues. the second thing, is that linux and ubuntu are not windows. the linux kernel uses hardware accelleration in OpenGl if its available. if someone ever asks you to upgrade display drivers on linux builds, that person should not be giving computer advice.
again, windows 7 cmes with problems. if i upgrade to windows 8, uo get a new set of problems. going up to 10, i get a newer set of issues. its best to deal with the problems that my current OS has, the devil that you know.
lines on the sceen mean bad ram.