BTW, a handy-dandy GUI-based tool to have installed to test different kernels is the GRUB-CUSTOMIZER package. Please DO NOT uninstall the "stock" 4.4.x kernel, you may to fall-back to it if the upstream kernel doesn't work.
https://launchpad.net/~danielrichter2007/+archive/ubuntu/grub-customizer
BTW, a handy-dandy GUI-based tool to have installed to test different kernels is the GRUB-CUSTOMIZER package. Please DO NOT uninstall the "stock" 4.4.x kernel, you may to fall-back to it if the upstream kernel doesn't work.
https:/ /launchpad. net/~danielrich ter2007/ +archive/ ubuntu/ grub-customizer