I am very thankful to share your experiences in connecion with this issue! I try to expect this fact. If i buy a laptop coolerpad i hope that this "problem" will be less embarassing,
Hello. I've just bought 7520 model with Ubuntu aboard also and seems have the same problem (irritating fan noise even during idle or minimal usage).
Hardware diagnostics was passed successfully, but I have 4500-4600 RPM whole the time, even just after the power on.
CPU Therm sensor in idle shows 60 C, 76 C was the highest value during PSA tests.
BIOS version is A09
I decided to don't take a risk updating bios. A had a strange situation next day (the second day from the buying) - the temperature environment was the same, but the fun system behavior changed - became more adequate - it looks like a car engine break-in - you have to pass some distance to make engine details fitted . Yes, I still have noise fan system sometimes, but now it can turn fans on and off depending on system load. Also I had Ubuntu updated to 12.10 before - not sure, but may be something changed with it also.