Can't show process name though GPU workload is same with nvidia-smi (Ubunu20)

[lakehu]

I build it on Ubunu20/CUDA12.2.
nvtop can update its GPU workload but it can't show process name. Why??

nvidia-smi
Thu Nov 28 10:36:03 2024
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.183.01 Driver Version: 535.183.01 CUDA Version: 12.2 |
|-----------------------------------------+----------------------+----------------------+
| 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 Quadro P2000 Off | 00000000:2D:00.0 Off | N/A |
| 48% 37C P8 4W / 75W | 14MiB / 5120MiB | 0% Default |
| | | N/A |
+-----------------------------------------+----------------------+----------------------+

+---------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=======================================================================================|
| 0 N/A N/A 1395 G /usr/lib/xorg/Xorg 9MiB |
| 0 N/A N/A 1521 G /usr/bin/gnome-shell 1MiB |
+---------------------------------------------------------------------------------------+