sorry，l don"t know your speak,beacuse l am a student

What's the version of the kernel and the display driver ?Try to reinstall the display driver.

Kernel 5.10.5 and Driver Version: 455.45.01  as per the latest Deepin update

Do you fully purging the driver and then reinstalling?

Run "dkms status" in deepin-terminal and see if "nvidia-current" module is installed in current kernel version.

If not, you need to run "sudo dkms install nvidia-current/455.45.01" manually after booting with specific kernel version.

Seems that it should work...... I have no idea what happened...... Maybe you need to follow the instructions on Wiki again and see if those configs and scripts were correct.

They were considering they worked with Kernel 5.8 but I will redo the process.

Redoing it did nothing.

There are the configurations as per the wiki.

Please run and post the output:

nvidia-smi

Make sure the new NVIDIA driver is loaded.

If I run the following, I get  'No devices were found'

nvidia-smi

However, If I run 

sudo nvidia-smi

I get the following:

+-----------------------------------------------------------------------------+
| NVIDIA-SMI 455.45.01    Driver Version: 455.45.01    CUDA Version: 11.1     |
|-------------------------------+----------------------+----------------------+
| 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  GeForce GTX 1650    Off  | 00000000:01:00.0 Off |                  N/A |
| N/A   50C    P0    14W /  N/A |      0MiB /  3911MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|  No running processes found                                                 |

xrandr --listproviders 

only produces the following:

Providers: number : 1
Provider 0: id: 0x43 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 3 outputs: 1 associated providers: 0 name:modesetting

Below is the output of 

grep nvidia /etc/modprobe.d/* /lib/modprobe.d/*

/etc/modprobe.d/nvidia.conf:install nvidia modprobe -i nvidia-current $CMDLINE_OPTS
/etc/modprobe.d/nvidia.conf:install nvidia-modeset modprobe nvidia ; modprobe -i nvidia-current-modeset $CMDLINE_OPTS
/etc/modprobe.d/nvidia.conf:install nvidia-drm modprobe nvidia-modeset ; modprobe -i nvidia-current-drm $CMDLINE_OPTS
/etc/modprobe.d/nvidia.conf:install nvidia-uvm modprobe nvidia ; modprobe -i nvidia-current-uvm $CMDLINE_OPTS
/etc/modprobe.d/nvidia.conf:remove nvidia modprobe -r -i nvidia-drm nvidia-modeset nvidia-uvm nvidia
/etc/modprobe.d/nvidia.conf:remove nvidia-modeset modprobe -r -i nvidia-drm nvidia-modeset
/etc/modprobe.d/nvidia.conf:# These aliases are defined in *all* nvidia modules.
/etc/modprobe.d/nvidia.conf:alias       pci:v000010DEd00000E00sv*sd*bc04sc80i00*        nvidia
/etc/modprobe.d/nvidia.conf:alias       pci:v000010DEd00000AA3sv*sd*bc0Bsc40i00*        nvidia
/etc/modprobe.d/nvidia.conf:alias       pci:v000010DEd*sv*sd*bc03sc02i00*               nvidia
/etc/modprobe.d/nvidia.conf:alias       pci:v000010DEd*sv*sd*bc03sc00i00*               nvidia
/etc/modprobe.d/nvidia-kernel-common.conf:alias char-major-195* nvidia
/etc/modprobe.d/nvidia-kernel-common.conf:#options nvidia NVreg_DeviceFileUID=0 NVreg_DeviceFileGID=44 NVreg_DeviceFileMode=0660
/etc/modprobe.d/nvidia-kernel-common.conf:# options nvidia NVreg_EnableAGPSBA=1
/etc/modprobe.d/nvidia-kernel-common.conf:# options nvidia NVreg_EnableAGPFW=1

Please I need to get this working.

How do you recommend I do that? Purge-it completely and reinstall?

Cause I tried first installing Deepin without the Nvidia drivers updating to 5.10 and then installing the driver. Same issue.

What about the kernel 5.8、5.7 and so on?