I have dual booted Ubuntu 12.10 with Windows 7 on my Dell Inspiron 15r 3rd gen laptop. In Windows I have absolutely no problem with fan. But when I boot into Ubuntu after about a min the fan speed starts increasing & about 5mins later the fan is at extremely high speed. This is resulting lots electricity being sucked by the AC Adapter because it becomes extremely hot.
I have ATI Radeon 7670m GPU. I dont know whether the CPU fan or the GPU fan is running. So I wanted to know whether it is possible to know the temperature of all the hardware like CPU, GPU, HDD, etc? So that I can understand which driver is having the problem. Any other mechanism to debug the cause of problem would also be very helpful. Thank You.