I have AMD 7940hs pro, ubuntu 24.04.1, kernel 6.8.0.48 (and tested many other mainline kernels, the issue is always there). I have many issues, but the most serious one is the CPU sometime times (not always, say 50% of the times) wakes up with it's 10% maximum speed. This caused lag and I cannot resolve it without rebooting the computer.
Ubuntu (both 22.04 and 24.04) gives me a lot of issues with this "newer" hardware (although it is almost 2 years old!). I wish I could use the mac OS so that this nonsense ends here.