I have been having a very frustrating problem in Ubuntu. Sometimes, there is a graphical effect that can only be described as flickering or undulation. I think undulation is the most accurate one, since that is really what it looks like, like the bottom of a pool of clear water. It used to happen on windows as well, when I was doing graphically intensive things, but it started appearing on Ubuntu even when I was just browsing the internet.
I thought it might be a problem with drivers, so I tried to find proper drivers on Ubuntu. Well, this is where I got completely stuck. The proprietary drivers that apparently work the best turned out to not work for my graphics card (since it is an older card). My card is an ATI Radeon HD 4670.
I have several questions. 1) I did everything I could to find working drivers for my card on my OS (Ubuntu 13.04) but I did not find anything. What is the best driver I could get, and where could I get it? People have suggested several open source drivers already but I'm not sure which to install, and which are the best. 2) I downgraded my Xserver in an attempt to install a proprietary driver, and I could not do it. As embarrassing as it is, now I do not know how to upgrade my Xserver again. When looking for Xserver upgrades, I ultimately found four packages. I did not know which one was which, so I just left it downgraded.