Another thing which comes to mind, you can try enabling or disabling p-states, intel_pstate=enable/disable in the kernel parameters for grub. If memory serves if cpu-freqinfo gives you a list of governors that means pstates are disabled, if they are enabled you will just get two governors at most. P-states work well with some configurations and cause issues with others. Been awhile since I have had to deal with this but I have one laptop that did have issues with p-states enabled, things would run hot and I would get glitches and laptop would just crash under very heavy loads, disabling p-states solved it. My other laptop would never get to speed and was very sluggish unless p-states was enabled.

I have not had to deal with this sort of thing since I gave up rolling release distro so I do not remember the exact details.