1080Ti & P620 on Ubuntu


I have a computer with two 1080Ti for machine learning and for displays P620. After installation the proprietary drivers for ubuntu, the monitors dont work until they are connected to 1080Ti. monitors connected to P620 are blank. If the 1080Ti cards are removed P620 works fine using the same drivers.
My question is, how to force Ubuntu to use P620 for displays and 1080 only for CUDA.

any suggestions will be appreciated


on linux, launch the nvidia control panel using the command line:


from there you should be able to change the display configuration

Hi, Thanks for the response.

I tried to set it up, but the nvidia-settings returns the following error:

(nvidia-settings:3484): GLib-GObject-CRITICAL **: 19:10:21.881: g_object_unref: assertion ‘G_IS_OBJECT (object)’ failed

Despite the above error I modified the X Server display settings, but the screen connected to P620 is blank.

More details:




did you run nvidia-settings as root?

I should have said:

sudo nvidia-settings

Yes, I run it as root

The picture here:


Shows an X screen configured on GPU 0. That isn’t right.

Configure a single X screen (X screen 0) on your GPU 1. no other X screens, nor should any screen be configured on GPU 0 or GPU 2.

You will need to connect monitors to the P620, did you do that?

Thanks for your help.
This worked!