Comment 14 for bug 1289420

This is just a completely harmless leftover:

7.355529] init: Failed to spawn hybrid-gfx main process: unable to execute: No such file or directory

there's probably something wrong with bbswitch.

What happens if you type:

echo "OFF" | sudo tee /etc/prime-discrete

and then you log out and log back in? (please attach both dmesg and /var/log/gpu-manager.log after that)