Hi friends. I think some/most of you tried installing GNOME shell back in your machine and found some improper topbar, different colored bars etc. If you found that and you are thinking of solving that, then please do not do it for a while. It will make your system hot. It uses maximum CPU and thus there is a great danger for your machine to lose the performance in future. So, do not try that solution for now.
Hope you will take care of your machine. There is a solution by removing fglrx package and bringing it all back. But make sure that you wanna do that before you do.
Follow this and do. But Still no proper update about machine getting hot issue.