The kernel doesn't be update after install ROCm kernel

[saibalalin]

Hi,
I found my OS cannot be updated to ROCm kernel also the kfd not be loaded successfully after reboot the system when I finish the ROCm kernel installation.

I follow the tutor as below steps:

sudo apt update && sudo apt install linux-headers-4.13.0-32-generic linux-image-4.13.0-32-generic linux-image-extra-4.13.0-32-generic linux-signed-image-4.13.0-32-generic
sudo reboot

wget -qO - http://repo.radeon.com/rocm/apt/debian/rocm.gpg.key | sudo apt-key add -
echo deb [arch=amd64] http://repo.radeon.com/rocm/apt/debian/ xenial main | sudo tee /etc/apt/sources.list.d/rocm.list
sudo apt-get update && sudo apt-get install rock-dkms
sudo update-initramfs -u
sudo reboot

And here is my OS configuration:
OS Version: Ubuntu 16.04.05 Server Edition
GUI: Text mode only without GUI
Kernel: 4.15.0-29-generic

Thank you guys.