Quadro P4000 How to set 10bpc in the Ubuntu 18.04?

My graphics card is Quadro p4000.
The driver version is 440.82.
Running on Ubuntu 18.04.0.
But I want setting 10pcb.
Does the video card support 10bpc on this system?
For the same facility can support 10bpc in the Windows, But why I can’t see the 10bpc in the Ubuntu, Only 6bpc and 8bpc.

You would have to create a xorg.conf with a screen section setting this:

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    30	
    SubSection     "Display"
        Depth       30
    EndSubSection
EndSection

Be warned, though, that many applications and window managers won’t correctly work with 30bit visuals. YMMV

Can’t be done in NVIDIA control panel?

No.
Full xorg.conf

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    Option         "AllowEmptyInitialConfiguration"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    DefaultDepth    30	
    SubSection     "Display"
        Depth       30
    EndSubSection
EndSection

Excuse me, but where do I create this file?
Then how to see the current state after finishe it ?

Hello
excuse me
I changed the settings the way you game me ,But now it’s has a new question
When I changed the number to 30, my system desktop couldn’t operate, the wallpaper turned black, but the keyboard shortcut was still available
when I turn the ‘DefauLtDepth and Depath’ to 24,It’s turn to normal
Why? What should I do ?
Please help me to solve this qusetion

Like said, many applications and window managers (desktop environments) don’t work with 30bit depth. I don’t know if this has been changed in newer Gnome, you could try installing Ubuntu 20.04. I can’t really recommend you a working DE since I don’t have info on current state any of those when it comes to 10bpc.

Ok I get , let me try to install Ubuntu20.04

Soory~
I have to disturb you again
I’ve had try to set 10 bpc in the Ubuntu 20.04. But when I have installed the NVIDIA driver,My mouse and keyboard are not available and shortcut keys are no longer available. I unloaded the NVIDIA driver and these was back to normal.
OMG!! I will be crazy
So do you have any other idea to slove this qusetion?