These are my notes on how to fix the lenovo coil whine, basically, I force C states to neven be more than C1, I used an example program from a PDF:

https://wiki.bu.ost.ch/infoportal/_media/embedded_systems/ethercat/controlling_processor_c-state_usage_in_linux_v1.1_nov2013.pdf

These are the files:

        lenovo_fix_coil_whine_instructions.txt

        lenovo_coil_whine_to_do.txt

controlling_processor_c-state_usage_in_linux_v1.1_nov2013.pdf

        lenovo_fix_coil_whine.7z

–jmc 2026