[Bug 1901137] Re: UEFI on Legacy - grub-install fails due to no space left on ESP

[Plurtu]

Even the most straight-forward option "Erase disk and install Ubuntu"
failed for me on non-UEFI system when installing from USB. I noticed
that 20.04 created a single bootable partition while 20.10 creates
additional BIOS Boot and EFI System partitions.

The Bug #1893964 Comment #8 workaround (doing grub-install manually)
worked for me but after updating I still had to correct /etc/fstab for
the /boot/efi device partition.

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https://bugs.launchpad.net/bugs/1901137

Title:
  UEFI on Legacy - grub-install fails due to no space left on ESP

Status in ubiquity package in Ubuntu:
  Triaged

Bug description:
  The system has PCLinuxOS on sda1 and sda2 Linux Mint 20 on sda9 and
  sda10 Windows 7 on sdb1 Windows 10 on sdb2

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: ubiquity 20.10.13
  ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
  Uname: Linux 5.8.0-25-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu50
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.455
  Date: Fri Oct 23 12:26:45 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu-MATE 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  RebootRequiredPkgs:
   linux-image-5.8.0-25-generic
   linux-base
   linux-base
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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