Ha! I upgraded my kernel to the latest possible (issued today) - 4.15.0-041500rc8-generic
Guess what? ALl problems solved!
Sorry Manioa the spam filter ate your posts and I only just saw
Hi Manioa. That fan chirping sounds like a hardware issue. Would be interesting to see if it still occurs with Windows 10 (although I never install Windows on my laptops). Not sure what the dealio is with PC Specialists in regards to ripping the back cover off a laptop that's still under warranty. The other thing to consider, of course (if it's still under warranty), is handing it to PC Specialist for repair. I certainly wouldn't continue using a laptop with malfunctioning cooling.
yes[B said:EDIT:[/B] Actually, does it occur if you start the laptop and go in to the BIOS?
Thank you for the tip, yes but less annoying. It also tends to do the second sound ( see the second vid )[B said:EDIT2:[/B] Also, on my Defiance II, there's a key combination to turn the fans on full-power. I think it's something like CTRL + FN + 1 (I'm not in front of my Def2 at the moment, so cannot check). Would be interesting to see if the chirping persists if you turn the fans on full power.