I have the same Problem on CachyOS with KDE. The Laptop freezes most of the time while updating Packages or while logging off/shutting down the Laptop. Rarely happens when playing games. 545 works without Problems.
Specs:
Laptop: Lenovo Legion 7 Pro
Kernel: 6.7.8-2-cachyos
Plasma: 5.27.10
CPU: AMD Ryzen 9 7945HX
GPU: NVIDIA GeForce RTX 4090 Laptop GPU
The Bug Report is from 545:
nvidia-bug-report.log.gz (904.5 KB)