Chosen Solution
I have the late model 2013 MBP, and I dropped it (only three feet) at an angler that caused the screen to crack. I bought a replacement on eBay, but didn’t read the fine print and discovered that the cables which connect the camera etc. were cut. Ever since then, I’ve had issues with the GPU sense and another sensor that are all reporting -124 which causes kernel_task to consume more than 600% CPU and the laptop runs slower than molasses. Is there any way to replace these sensors and/or is there a way to tell osx to ignore the sensor readings so I can have the performance back on my MBP? Thank you for your time. Mike
The Solution To My Problem The final solution to this problem, was to simply take the MacBook Pro apart once again, then while I had it open, I cleaned it up really nice … removing as much dust as I could from the fans and the motherboard etc. I then re-seated the mounting screws for the screen hinges, as a couple of them had come loose over the months. I re-seated all connecters that I had previously disconnected in order to replace the screen, then I CAREFULLY put everything back together and fired it up. It’s been at least five days now, and no matter which position I have the laptop in, the sensors work perfectly, and I have had no high usage of the kernel_task process and no slow downs at all. Dan, thank you ever so much for being patient and thoughtful throughout this process. I admit, at one time I thought you were over-simplifying the problem but in the end, Occam’s razor proved to win again - the simplest solution was indeed the correct solution.
The problem here is the retina displays are not easy to take apart. In the process you’ll likely damage it. If you have the skills you might be able to swap the parts out between your old unit and the new one. Frankly, I would just try getting a new display assembly from a better source. Disabling things won’t help you here either. Sorry ;-{
