Different monitors used in #26, same monitors in all other cases. Hopefully Bionic installer will be fixed in the .4 release and I will be able to try it out.
Possibly helpful: I was trying out 4.15 kernels from xenial-proposed for another ticket and the issue remains the same on 4.15. nVidia drivers have gone up to 390.25 since the original post too and the issue remains.
Different monitors used in #26, same monitors in all other cases. Hopefully Bionic installer will be fixed in the .4 release and I will be able to try it out.
Possibly helpful: I was trying out 4.15 kernels from xenial-proposed for another ticket and the issue remains the same on 4.15. nVidia drivers have gone up to 390.25 since the original post too and the issue remains.