Hah!
Unfortunately, I cannot reproduce it at the moment. But I did some
digging when I *could* reproduce it:
The problem appears when the nvidia driver binds to /dev/fb0 (which I
*think* is caused by the firmware selecting it as the boot VGA device?).
When nvidia is driving /dev/fb0, nothing from the is shown on the
display (obviously, as the display is hooked up to the Intel), and gpu-
detect does *not* detect that it needs offloading.
By switching the fbcon onto /dev/fb1 (via the fbcon=map:1 kernel
parameter) I get VT content and can start X on the Intel card by
manually modprobing bbswitch, unloading nvidia, “echo OFF | sudo tee
/proc/.../bbswitch”, and then starting GDM.
In this situation, by using the xorg.conf I attached, PRIME offload
nvidia/intel works fine.
At the moment i915 is binding to /dev/fb0, and gpu-manager/nvidia-
settings is working fine switching between Intel and NVIDIA.
What happens to bind to /dev/fb0 seems to be semi-stable - it tends to
persist across reboots and power cycling, but it has flipped a couple of
times in the past for some reason. The kernel booed does not appear to
be the determining factor.
Next time it boots with NVIDIA binding to /dev/fb0 I'll get you the
requested log :)
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https://bugs.launchpad.net/bugs/1705609
Title:
gpu-manager fails to detect hybrid requirements of Oryx Pro
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