Comment 42 for bug 1765363

Here's my workaround, running on xps 15" with 1050.

sudo apt install nvidia-prime

kernel param nouveau.modeset=0 (I think this is probably dumb of me, but not sure)

sudo prime-select intel

sudo apt install bbswitch-dkms

add bbswitch to /etc/modules by

sudo gedit /etc/modules

and add the line

bbswitch load_state=0

(this did not work for me)

I have to use
sudo tee /proc/acpi/bbswitch <<<OFF

but i'm finally running intel, at a cost of 10-11W in powertop

sudo powertop

(unplug your laptop before running powertop, or you can't see wattage)