This install (existing partition) was attempted & failed TWICE on the same sda1 partition using Lubuntu daily.
It was then used to attempt to install UBUNTU hirsute (daily; ubiquity) which failed with a different grub-install related issue (no efi partition from memory).
Post these; I RE-ATTEMPTED THE INSTALL (same exact parameters in calamares) and this time the INSTALL WAS FLAWLESS !!
(Packages weren't exactly as I expected (ie. matching original lubuntu bionic install); but I'm blaming that on the multiple attempts & esp. ubuntu attempted install and I'd verified what was installed during that stage as it didn't boot... Anyway as a end-user I'd be fully happy with this last install result)
Update (the following day)
This install (existing partition) was attempted & failed TWICE on the same sda1 partition using Lubuntu daily.
It was then used to attempt to install UBUNTU hirsute (daily; ubiquity) which failed with a different grub-install related issue (no efi partition from memory).
Post these; I RE-ATTEMPTED THE INSTALL (same exact parameters in calamares) and this time the INSTALL WAS FLAWLESS !!
refer http:// iso.qa. ubuntu. com/qatracker/ milestones/ 419/builds/ 229234/ testcases/ 1701/results
(Packages weren't exactly as I expected (ie. matching original lubuntu bionic install); but I'm blaming that on the multiple attempts & esp. ubuntu attempted install and I'd verified what was installed during that stage as it didn't boot... Anyway as a end-user I'd be fully happy with this last install result)