Dont Panic! KDE font looks ugly suddenly

Today, after a crash, I suddenly found all fonts are looking ugly. I had similar experience earlier, but that was with Fedora with Gnome desktop. There, I was unable to solve the problem properly. I got some workaround and compromised with the semi-ugly looking fonts until the further release of Fedora. Here, I won't want to carry the same pain for next few months. So, I search vigorously to get some solid solution but fail to do. Finally, in a forum discussion, I got a comment, which lead me to the solution.  complete article