When the game enters the menu, everything appears to be rendered correctly except for the fact that it is very dark.
I have confirmed using radeontop that the AMD GPU is used for rendering the menu.
(couldn't find any indication of this in the game log)
I'm seeing the same issue on Rise of the Tomb Raider, also on a prime setup
Which versions of Xorg, which DDX, kernel and Mesa are you using?
Kernel version: 4.16.5
xorg core: 1.19.6
amdgpu DDX: 18.0.1
modesetting DDX: 1.19.6
Hmm, what about the vulkan loader version?
This issue should be fixed by