OS: Ubuntu 12.04 Laptop: Sony E-Series SVE14A37CDH. Graphics: AMD Radeon HD 7600M Series Hybrid GPU.
I installed the proprietary AMD Catalyst drivers from: http://support.amd.com/us/gpudownload/linux/Pages/radeon_linux.aspx
I followed this tutorial: What is the correct way to install proprietary ATI Catalyst Video Drivers (fglrx) directly from AMD?
When I switch to the integrated Intel GPU (using the Catalyst Control Center) it works fine until I suspend and resume. At this point the fan powers up full speed and does not stop. The CPU load is very low and laptop is cool.
This only happens while using the Intel GPU, and does not happen when Radeon GPU is enabled.
Any ideas would be greatly appreciated!
Edit: I just did a fresh install, turned off discrete GPU with vgaswitcheroo using only the default drivers (no fglrx installed at any point) and the problem still happens. When the computer returns form suspend, the fan revs up and doesn't stop.