Comment 134 for bug 1778011

@Alberto I'm afraid I have to add to the pile of users reporting issues here. Kernel 4.20.14 with 418.43 drivers. Ubuntu 18.04.2 LTS, on an X1 Extreme.

Using both GDM3 and lightdm, "prime-switch intel" doesn't seem to power off the nvidia GPU. power seems to go between 25-35W on battery. Using powertop to set the Nvidia GPU to `Good` doesn't seem to help (100% usage in Device stats).

Attached are gpu-manager.log and gpu-manager-switch.log (while in prime-select intel mode). I'm not using bbswitch. I've rebooted a few times while in intel mode to see if that would take. No die.

Also including output of apt-list --installed | grep nvidia:

libnvidia-cfg1-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
libnvidia-common-418/bionic,bionic,now 418.43-0ubuntu0~18.04.1 all [installed,automatic]
libnvidia-compute-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
libnvidia-decode-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
libnvidia-encode-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
libnvidia-fbc1-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
libnvidia-gl-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
libnvidia-ifr1-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
nvidia-compute-utils-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
nvidia-dkms-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
nvidia-driver-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed]
nvidia-kernel-common-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
nvidia-kernel-source-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
nvidia-prime/bionic-updates,bionic-updates,now 0.8.8.2 all [installed]
nvidia-settings/bionic,now 418.43-0ubuntu0~gpu18.04.1 amd64 [installed,automatic]
nvidia-utils-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]
xserver-xorg-video-nvidia-418/bionic,now 418.43-0ubuntu0~18.04.1 amd64 [installed,automatic]

I'm fairly new to Linux, but if there's any additional information I can provide, I'd be glad to assist.