I also built ubuntu-bionic: Ubuntu-4.15.0-23.25 reverting d8a077b6271ef3d7620f0e95d4a343ec1661fe5d (which is the same commit in the ubuntu-bionic repo).
I see that there is a brief text terminal between grub and the ubuntu loading screen, but at least it seems to boot reliably with a second monitor connected.
Maybe there is another way to have a pretty boot process with the newer kernels?
I also built ubuntu-bionic: Ubuntu-4.15.0-23.25 reverting d8a077b6271ef3d 7620f0e95d4a343 ec1661fe5d (which is the same commit in the ubuntu-bionic repo).
I see that there is a brief text terminal between grub and the ubuntu loading screen, but at least it seems to boot reliably with a second monitor connected.
Maybe there is another way to have a pretty boot process with the newer kernels?