Hello everyone. I have finally got a hands on with Manjaro on my laptop. I love it so far. But one small thing keeps me from having the perfect experience.
I have an NVIDIA Optimus system on my laptop with Intel UHD630 & RTX 2070 Mobile combination. Since the 2070 is a Turing architecture card, it can powered off completely if it’s not in use. But mine does not because the Xorg process uses about 4 MiB of GPU memory and prevents NVIDIA GPU to fully turn off.
nvidia-smi output:
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 470.63.01 Driver Version: 470.63.01 CUDA Version: 11.4 |
|-------------------------------+----------------------+----------------------+
| 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 ... On | 00000000:01:00.0 Off | N/A |
| N/A 36C P8 6W / N/A | 5MiB / 7982MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| 0 N/A N/A 536 G /usr/lib/Xorg 4MiB |
+-----------------------------------------------------------------------------+
cat /proc/driver/nvidia/gpus/0000:01:00.0/power output:
Runtime D3 status: Enabled (fine-grained)
Video Memory: Active
GPU Hardware Support:
Video Memory Self Refresh: Supported
Video Memory Off: Supported
Power Limits:
Default: N/A milliwatts
GPU Boost: N/A milliwatts
How can I stop Xorg using that 4 MiB of GPU memory and enjoy my fully-powered off GPU when not in use?
It’s a newly installed system so I haven’t installed/deleted/changed any driver or driver-related settings. I have only enabled nvidia-persistenced service as advised in Arch Wiki.
Thanks in advance.