Ubuntu wakes up immediately from sleep after NVIDIA driver update

These errors appear cause you have to install NVIDIA-{suspend/hibernate/resume} services.

Something like this:

sudo install /usr/share/doc/NVIDIA_GLX-1.0/samples/systemd/nvidia-suspend.service /etc/systemd/system
sudo install /usr/share/doc/NVIDIA_GLX-1.0/samples/systemd/nvidia-hibernate.service /etc/systemd/system
sudo install /usr/share/doc/NVIDIA_GLX-1.0/samples/systemd/nvidia-resume.service /etc/systemd/system
sudo install /usr/share/doc/NVIDIA_GLX-1.0/samples/systemd/nvidia /lib/systemd/system-sleep
sudo install /usr/share/doc/NVIDIA_GLX-1.0/samples/systemd/nvidia-sleep.sh /usr/bin

The NVIDIA systemd services then need to be enabled:

sudo systemctl enable nvidia-suspend.service
sudo systemctl enable nvidia-hibernate.service
sudo systemctl enable nvidia-resume.service

Reinstalling the NVIDIA driver should help.