System unstable without amdgpu.runpm=0

Brief summary of the problem:

• The system almost instantly crashes, if the kernel parameter has not been set: amdgpu.runpm=0
• I presume setting this kernel parameter has a negative effect on the battery drain due to the dGPU not being turned off.

Hardware description:

• APU: AMD Ryzen 7 4800H (Renoir)
• iGPU: AMD Vega 7
• dGPU: AMD Navi 14 Radeon RX 5500M
• System Memory: 2x 8GB DDR4-3200
• Display(s): 1920x1080 @ 144Hz
• Type of Display Connection: eDP
• Laptop model: MSI Bravo 17 - A4DDR-035NL

System information:

• Distro name and Version: Arch Linux
• Kernel version: 5.8.7, 5.8.8, 5.9.0-rc5
• Using Plymouth

How to reproduce the issue:

• Boot system
• It will crash just before any graphical action
• If amdgpu is loaded in the initramfs it crashes even earlier.

Attached files:

• Dmesg log of booting with kernel parameter is attached.

dmesg-amdgpu.txt