The nouveau module isn't getting blacklisted correctly, when it loads nvidia can't load which is what's happening in this dmesg. Do you have an /etc/modprobe.d/nvidia-graphics-drivers.conf and does it contain blacklist nouveau in it? If so, can you run sudo update-initramfs -u and reboot to see if it fixes the problem?
The nouveau module isn't getting blacklisted correctly, when it loads nvidia can't load which is what's happening in this dmesg. Do you have an /etc/modprobe. d/nvidia- graphics- drivers. conf and does it contain blacklist nouveau in it? If so, can you run sudo update-initramfs -u and reboot to see if it fixes the problem?