I have fixed D3 powersaving by manually configuring everything for my Turing MX450 after getting rid of envycontrol.
sudo envycontrol --reset
reboot
/etc/modprobe.d/nvidia-pm.conf
Note that for Turning NVreg_DynamicPowerManagement=0x03 won’t work but you can use that for Ampere or later
# below two options are already coming from /usr/lib/modprobe.d/nvidia-* files
# options nvidia NVreg_PreserveVideoMemoryAllocations=1
# options nvidia NVreg_TemporaryFilePath=/var/tmp
options nvidia-drm modeset=1
options nvidia "NVreg_DynamicPowerManagement=0x02"
options nvidia NVreg_UsePageAttributeTable=1 NVreg_InitializeSystemMemoryAllocations=0
options nvidia NVreg_EnableGpuFirmware=0
options nvidia NVreg_EnableS0ixPowerManagement=1
options nvidia NVreg_DynamicPowerManagementVideoMemoryThreshold=10
/etc/udev/rules.d/80-nvidia-pm.rules
Note that first three rules also exist in envycontrol code. Rest are in arch wiki
# Remove NVIDIA USB xHCI Host Controller devices, if present
ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x0c0330", ATTR{remove}="1"
# Remove NVIDIA USB Type-C UCSI devices, if present
ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x0c8000", ATTR{remove}="1"
# Remove NVIDIA Audio devices, if present
ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x040300", ATTR{remove}="1"
# Enable runtime PM for NVIDIA VGA/3D controller devices on adding device
ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030000", TEST=="power/control", ATTR{power/control}="auto"
ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030200", TEST=="power/control", ATTR{power/control}="auto"
# Enable runtime PM for NVIDIA VGA/3D controller devices on driver bind
ACTION=="bind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030000", TEST=="power/control", ATTR{power/control}="auto"
ACTION=="bind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030200", TEST=="power/control", ATTR{power/control}="auto"
# Disable runtime PM for NVIDIA VGA/3D controller devices on driver unbind
ACTION=="unbind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030000", TEST=="power/control", ATTR{power/control}="on"
ACTION=="unbind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030200", TEST=="power/control", ATTR{power/control}="on"
Rebuild dracut or whatever you have to update initramfs and reboot
sudo dracut-rebuild
nvidia-persistenced service is already enabled and started.
Now you can see that everything is working as expected with sleep and hibernate support as well.
❯ cat /proc/driver/nvidia/gpus/0000:05:00.0/power
Runtime D3 status: Enabled (fine-grained)
Video Memory: Active
GPU Hardware Support:
Video Memory Self Refresh: Supported
Video Memory Off: Supported
S0ix Power Management:
Platform Support: Supported
Status: Enabled
Notebook Dynamic Boost: Not Supported
❯ modprobe nvidia --showconfig | rg NVreg
options nvidia "NVreg_DynamicPowerManagement=0x02"
options nvidia NVreg_UsePageAttributeTable=1 NVreg_InitializeSystemMemoryAllocations=0
options nvidia NVreg_EnableGpuFirmware=0
options nvidia NVreg_EnableS0ixPowerManagement=1
options nvidia NVreg_DynamicPowerManagementVideoMemoryThreshold=10
options nvidia NVreg_PreserveVideoMemoryAllocations=1
options nvidia NVreg_TemporaryFilePath=/var/tmp
❯ cat /sys/bus/pci/devices/0000:05:00.0/power/runtime_suspended_time
453877
❯ cat /sys/bus/pci/devices/0000:05:00.0/power/runtime_status
suspended
❯ cat /sys/class/drm/card*/device/power_state
D3cold
D0
I have restored /usr/share/X11/xorg.conf.d/10-nvidia-drm-outputclass.conf as well so nvidia-smi just shows Xorg by default. but since I have NVreg_DynamicPowerManagementVideoMemoryThreshold set to 10, it doesn’t prevent nvidia from entering D3cold
❯ nvidia-smi
Sun Aug 31 17:22:06 2025
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 580.76.05 Driver Version: 580.76.05 CUDA Version: 13.0 |
+-----------------------------------------+------------------------+----------------------+
| GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|=========================================+========================+======================|
| 0 NVIDIA GeForce MX450 On | 00000000:05:00.0 Off | N/A |
| N/A 46C P8 N/A / 5001W | 5MiB / 2048MiB | 0% Default |
| | | N/A |
+-----------------------------------------+------------------------+----------------------+
+-----------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=========================================================================================|
| 0 N/A N/A 950 G /usr/lib/Xorg 4MiB |
+-----------------------------------------------------------------------------------------+
References:
imranr comment from https://aur.archlinux.org/packages/nvidia-prime-rtd3pm