Comment by spuz
This completely killed my OS and nearly took the PC with it. It started running ok but as it filled the screen, the FPS dropped and then my browser stopped responding, then the mouse started moving VERY slowly and then the screen went black and my Bluetooth got disconnected. At that point, even long-pressing the power off button did nothing and I had to switch off the PC at the wall...
I am going to put the blame on Firefox and Linux Mint but it's honestly impressive how a simple animated simulation can do this.
I have never seen a long press fail to cut power- assuming it works at all. I've never heard of it being tied to CPU state.