On Debian can use only HDMI monitor but not notebook screen

I have just installed the proprietary nVidia driver on Debian 10 on a Dell G3 notebook. It can see the monitor I have plugged in over HDMI and works great, but can no longer detect the built in screen. (Nouveau did the opposite).

xrandr gives:

Screen 0: minimum 8 x 8, current 1080 x 1920, maximum 32767 x 32767                                       
    HDMI-0 connected primary 1080x1920+0+0 left (normal left inverted right x axis y axis) 527mm x 296mm      
       1920x1080     60.00*+  59.94    50.00    60.05    60.00    50.04                                       
       1600x1200     60.00
       1600x900      60.00
       1280x1024     75.02    60.02
       1280x720      60.00    59.94    50.00
       1152x864      75.00
       1024x768      75.03    60.00
       800x600       75.00    60.32
       720x576       50.00
       720x480       59.94
       640x480       75.00    59.94    59.93

How can I start using the built in screen again alongside this?

If your laptop’s internal display is connected to the iGPU, you may need to set up a “PRIME” display offload configuration. Please refer to the documentation for that.

Debian: https://wiki.debian.org/NvidiaGraphicsDrivers/Optimus
NVIDIA: https://download.nvidia.com/XFree86/Linux-x86_64/440.44/README/randr14.html

Hi, I have exactly the same problem. My laptop is a dell g3 3590, with GeForce GTX 1660 Ti Max - Q. I’ve tried many solutions, but still with the same problem.

Could someone help me? It’s very important .

Thanks!!!

Hey aplattner. This works for me. Thanks very much !!!

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