Successfully downloaded the kernel source?
Successfully installed a built kernel without it crashing on startup?
For Ubuntu 18.04.1?
I managed to use synaptic to get
linux-source version 188.8.131.52.39 linux-source-4.15.0 version 184.108.40.206.39
I copied the tarball
linux-source-4.15.0.tar.bz2 to my home directory.
Unzipped it and made it using (after installing libncurses)
make menuconfig copy .config to .config.bak make mrproper copy .config.bak to .config make dep make clean make bzImage make modules make modules_install make install
The kernel builds but after reset it tries to boot kernel 4.15.8 and fails because it cannot find a memory target.
Using the alternative method of downloading source
apt-get source linux-image-$(uname -r) fails for this reason
As someone who maintains a driver 18.04.1 is a useless release thus far.