NVIDIA Suspend fix

setup-nvdia-suspend.sh

# Use systemd for managing NVIDIA driver suspend in drivers ====>>> PRIOR to version 470 <<<=====
# https://download.nvidia.com/XFree86/Linux-x86_64/450.66/README/powermanagement.html
# https://forums.developer.nvidia.com/t/unable-to-set-nvidia-kernel-module-parameters/161306
# Please note: In Fedora Linux you may need to just install the xorg-x11-drv-nvidia-power pakage 
# as sugested by @goombah88 in the comments below. 

TMP_PATH=/var/tmp
TMPL_PATH=/usr/share/doc/nvidia-driver-460/

echo "options nvidia NVreg_PreserveVideoMemoryAllocations=1 NVreg_TemporaryFilePath=${TMP_PATH}" | sudo tee /etc/modprobe.d/nvidia-power-management.conf 

sudo install --mode 644 "${TMPL_PATH}/nvidia-suspend.service" /etc/systemd/system
sudo install --mode 644 "${TMPL_PATH}/nvidia-hibernate.service" /etc/systemd/system
sudo install --mode 644 "${TMPL_PATH}/nvidia-resume.service" /etc/systemd/system
sudo install "${TMPL_PATH}/nvidia" /lib/systemd/system-sleep
sudo install "${TMPL_PATH}/nvidia-sleep.sh" /usr/bin

sudo systemctl enable nvidia-suspend.service
sudo systemctl enable nvidia-hibernate.service
sudo systemctl enable nvidia-resume.service

This is my current setting and it's working for me (Linux Mint 22, Nvidia GeForce GTX 745 using Nvidia 550.107.02 driver)

sudo nano /etc/modprobe.d/nvidia-graphics-drivers-kms.conf

and add these lines into it:

options nvidia-drm fbdev=1 options nvidia NVreg_PreserveVideoMemoryAllocations=1 options nvidia NVreg_TemporaryFilePath=/var/tmp

This fixed my issues!
Laptop: Lenovo p16v Gen 1
System:
Kubuntu 24.04.2 LTS, noble
AMD Ryzen 7 7840HS w/ Radeon 780M Graphics
Nvidia rtx A500: Driver 570.133.07
Kernel: 6.11.0-24-generic

(Issue remaining: "unable to change power state from D3hot to D0")

I also tried the answer from dmikushin, but it didn't change anything!

sudo systemctl unmask nvidia-suspend
sudo systemctl enable nvidia-suspend
sudo systemctl unmask nvidia-resume
sudo systemctl enable nvidia-resume
sudo systemctl unmask nvidia-hibernate
sudo systemctl enable nvidia-hibernate