I installed nvidia drivers using nvidia-installer-dkms without issue.
I then chose to enable ‘Force Full Composition Pipeline’ in nvidia-settings.
As root I save the config to /etc/X11/xorg.conf.
After a reboot my display was inverted in both x and y orientations…a first for me
I was able to restore a sane display by deleting xorg.conf.
I was able to temporarily restore correct orientation with ‘xrandr -o normal’ for the current session. The fix was to delete xorg.conf.
It would be good to be able to set a xorg.conf without this outcome…