This guide was created for EndeavourOs Endeavour Release which if using the Online installer, as of July 2024, will provide Plasma 6.1 and Nvidia 555 drivers. This guide shows using Grub but will work with systemd-boot as well if you follow steps for kernel params.
- Create file /etc/modprobe.d/nvidia.conf with the following contents
options nvidia_drm modeset=1
options nvidia_drm fbdev=1
options nvidia NVreg_EnableGpuFirmware=0
options nvidia NVreg_PreserveVideoMemoryAllocations=1 NVreg_TemporaryFilePath=/var/tmp