Login-loop after installing nvidia-390(ppa) on Ubuntu-16.04

Hi there,
I got stuck in the “login-loop” just after I installed the nvidia-390 dirver from the graphics ppa.
Here is my nvidia-bug-report.log:

Thanks for the reading.
Any idea for fixing this problem?

Your kernel is too old for your intel gpu. For coffee lake, you’ll need at least kernel 4.15 and a recent package linux-firmware. Upgrade your hwe.

Thanks a lot!!
After I updated the kernel to 4.16, everything run well!