On Sun, 2025-08-17 at 15:49 -0400, Felix Miata wrote: > Van Snyder composed on 2025-08-17 12:31 (UTC-0700): > > > I found a page that says "The error has been seen when the > > /EFI/ubuntu > > directory is corrupted (bug 1090829)." Of course, I'm trying to > > install > > Debian but maybe there's a clue there — if only I knew where to > > read > > about bug 1090829. > > https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1090829 > grub-efi fails to install with Input/output error
The twelve-year-old answer I found was to make sure the EFI partition was FAT32 (mine was), at least 100 MB (mine was 500 MB), and within the first 100 GB on the drive. Mine was last on a 1 TB drive. When I rearranged things using gparted and put the UEFI partition early enough, the installer worked. Is this an unavoidable intrinsic problem with UEFI, or is it a twelve- year-old bug in grub-install or grub-mkconfig — or whatever the Debian installer uses?
