Switching fails on xubuntu 18.04

[gy-lehel]

Hi

It is not possible to select the nvidia profile with the current code, as it generates a configuration, that will result in cyclic Xorg crash, when using lightdm, and subsequent gui freeze, that can be exited only by requesting a power-off with the shutdown button, and selecting intel profile in a recovery session.
The issue here is, that module paths are not set up correctly, and devices are also not detected and set up correctly for offloading.

Solution to this, and support for offloading can be achieved by creating an 10-prime.conf file in /etc/X11/xorg.conf.d with the following content:

Section "ServerLayout"
Identifier "layout"
Screen 0 "nvidia"
Inactive "intel"
EndSection

Section "Device"
Identifier "nvidia"
Driver "nvidia"
BusID "<PCI-ID-OF_NVIDIA_CARD>"
EndSection

Section "Screen"
Identifier "nvidia"
Device "nvidia"
Option "AllowEmptyInitialConfiguration"
EndSection

Section "Device"
Identifier "intel"
Driver "modesetting"
Option "TearFree" "true"
EndSection

Section "Screen"
Identifier "intel"
Device "intel"
EndSection

Section "Files"
ModulePath "/usr/lib/xorg/modules"
ModulePath "/usr/lib/x86_64-linux-gnu/nvidia/xorg"
EndSection

Regards
Lehel

[gy-lehel]

This configuration file has to be removed, when selecting the intel profile.