I just received an update to the linux kernel of Ubuntu 14.04 from 3.13.0-30.54 to 3.13.0-30.55. After I upgrade it the CPU on my laptop is around 70 to 80 Degree Celsius. while on the previous kernel is about 55-65 Degree Celsius, and never reach about 75 Degree, except on some situation like running a Virtual Machine.
I don't know what caused this but I have to downgrade it to the previous 3.13.0-30.54 to prevent overheating on continual use.
Hope there is a new kernel update that fixes this.
Screenshot of the synaptic to show the version of the kernel will be posted later.