On Fri, Sep 14, 2018 at 2:12 PM, gregrwm <tclug1 at whitleymott.net> wrote:
>>> There are 20+ partitions on the hard disk so both systems have everything
>>> separate except /boot and /efi (whatever that partition is called).
>> so boot is shared?  if so, eek.  apt-get update on one will throw out
>> kernels still expected by the other.  and similar ugly contention for
>> maintaining grub.  this would explain why grub couldn't find the other OS.
> sharing /boot actually can work *if* the 2 grubs are in separate
> subdirectories, and if the kernels are different enough that updates from
> one don't affect the other.  still tho it may work, it will likely lead to
> significant confusion.

I had separate /boot partitions and that didn't seem to help so I removed
one and had one /efi and one /boot for both but still no joy. Therefore the

Thanking you for your ideas!!!