Nvidia monitor – 18.04 is off after waking up

After waking to suspend the screen remains off.

Everything else works, the system is not hanged.

The system is up to date, the kernel version is the latest – 4.15.0.46.

I have a computer with the following equipment:

  1. AMD Athlon CPU
  2. NVidia PCI-e card.
  3. MSI AM1I motherboard.

The BIOS does not have the ability to disable the integrated AMD graphics processor.

The graphics drivers are "proprietary, tested" (as they say) nvidia-390.

new is not loaded. (as the gpu-manager says)

amdgpu is NOT loaded. (as the gpu-manager says)