I have a $2000 laptop (i7-8550U with 16GB RAM QHD+, iCoil whiner++) and the coil whine is unacceptable, 2.4.2 made it a lot worse under linux.
I has something to do with CPU frequency.
when I do "sudo cpupower frequency-set --min 400000 --max 1000000"
than i have hardly any coil whine, but a slow laptop.
when I do "sudo cpupower frequency-set --min 300000 --max 4000000"
than I have horrible coil whine
Dell u need to fix this.
I've bought an XPS 13 in 12/2017.
Same problem for coil whine, bios is updated, i'm on linux etc...
1400€ + for this laptop and there is this kind of problems ? Unacceptable ...
Same issue for me. 9360 i7-8550U, bios at latest 2.5.1, running Ubuntu 16.04 with kernel 4.13 and coil whine is unacceptable. This is $2500 USD here in Europe, really unacceptable. Its not just coil whine, its also crackling and almost mechanic-like noises. How can PC with 0 movable parts except for the fan make so much noise I wonder.
Please Dell, do something! This has been an ongoing issue with XPS models for few years!