I believe we've addressed the crashes in installer with this bug:
https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1803031
This reverts part of the original changes, to catch cases where an ESP
isn't present and the system in booting in UEFI mode: rather than
crashing, there will be a clear warning presented to change the
partitioning scheme used (to add an ESP partition).
If you absolutely don't want to do that, then the solution will be to
boot in BIOS mode, where such a requirement doesn't exist (ie. if you
boot in BIOS mode Ubuntu will install in BIOS mode; if you boot in UEFI
mode, Ubuntu will install in UEFI mode; and if you install in UEFI mode,
you should boot to disk in UEFI mode -- that's typically where things
will break; people might be forced into booting in a specific mode for
disk, and a different mode for USB / DVD).
If you are having issues with booting in the right mode for what you
want; you might want to check forums/ doc for your particular BIOS, some
have their own little quirks we might not know about.
In other words, I think we're handling this properly now, by forcing the
creation of an ESP when you do the partitioning rather than crashing at
the end of the install and not letting you know why things went badly.
** Changed in: partman-efi (Ubuntu)
Status: Triaged => Fix Released
** Changed in: partman-efi (Ubuntu Artful)
Status: Triaged => Won't Fix
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https://bugs.launchpad.net/bugs/1668148
Title:
Booting installer in EFI mode with existing bios mode hd crashes
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