Comment 8 for bug 1852067

To install the testing kernel:

sudo dpkg -i linux-modules-xxx.deb
sudo dpkg- i linux-image-xxx.deb
sudo dpkg -i linux-modules-extra-xxx.deb
reboot

To choose the kernel:

you could press ESC button during the grub (bootloader) stage, then there is a menu you could choose the kernel.
After booting up, you could run uname -a to verify the kernel you are running.

To uninstall the testing kernel:

sudo dpkg -p linux-modules-extra-xxx.deb (run dpkg --list | grep linux-modules-extra*, then you will konw the full name of linux-modules-extra-xxx.deb)
sudo dpkg -p linux-image-xxx.deb
sudo dpkg -p linux-modules-xxx.deb.
reboot.