In my case problem now solved: On installation, do not forget to create a EFI System Partition (ESP), if it doesn't already exist.
1.- Live USB Stick, install Ubuntu
2.- on partitioning, select "something else"
3.- create EFI System Partition (ESP):
- on the 1st 100 G of the disk
- size > 100 M (recommended 200 M)
- "primary partition"
- type: "EFI"
4.- everything else as usual.
Affected by the same bug, I solved the point adding a small EFI (200M) partition before the OS / as
Dr_SE (test911turbo) wrote on 2017-03-06: (comment #14) here: https:/ /bugs.launchpad .net/ubuntu/ +source/ grub-installer/ +bug/1252255
In my case problem now solved: On installation, do not forget to create a EFI System Partition (ESP), if it doesn't already exist.
1.- Live USB Stick, install Ubuntu
2.- on partitioning, select "something else"
3.- create EFI System Partition (ESP):
- on the 1st 100 G of the disk
- size > 100 M (recommended 200 M)
- "primary partition"
- type: "EFI"
4.- everything else as usual.
Now it works fine with my old /home partition.