Re: New Grub2 verses Debian 9.5 -boots slow and strange?

[Pascal Hambourg]

Le 20/10/2018 à 15:10, Richard Owlett a écrit :
> I experiment multiple configurations on my machine.
> For my use case the Debian installer has two annoying "features".
(...)
> 1. If installer installs grub to boot partition it always gives priority
>     to the most recent install. *NOT* desirable when experimenting ;}

What do you mean by "install grub to boot partition" ? Do you mean that 
you share the same /boot among multiple installations ?

It seems desirable to me that GRUB gives priority to the system which 
installed it. What may be less desirable is that the latest GRUB takes 
precedence over the existing ones. How to avoid it depends primarily on 
whether the system boots in BIOS/legacy or UEFI mode.

> 2. If you want a swap partition used, there appears to be noway of using
>     the existing SWAP without changing its UUID - thus breaking all other
>     installs :<

Indeed. Note that an existing system can be set up to not rely on the 
swap UUID but on another persistent identifier such as PARTUUID, LABEL 
or PARTLABEL (the latter being available only on GPT). Otherwise, I 
suggest not to use the existing swap when installing a new system so 
that its UUID does not change, and add it afterwards in the new system 
config files instead of fixing config files on all other installed systems.