[Bug 1889107] [NEW] Installer failed to write grub to EFI, installing to root on logical volume inside LUKS wrapper, then later crashed

[Jonathan Watt]

Public bug reported:

I tried to install 20.04, creating the following custom partition
layout:

nvme0n1        259:0    0   1.9T  0 disk  
├─nvme0n1p1    259:3    0   512M  0 part  /target/boot/efi
└─nvme0n1p2    259:4    0   1.9T  0 part  
  └─cryptdata  253:0    0   1.9T  0 crypt 
    ├─vg0-root 253:1    0   1.5T  0 lvm   /target
    └─vg0-vms  253:2    0 371.2G  0 lvm   

Everything proceeded fine until I got a popup window with the message:

  Executing 'grub-install /dev/nvme0n1' failed.
  This is a fatal error.

In the details part of the main installer window was:

  ubuntu grub-installer: grub-install: error: attempting to install to
encrypted disk without cryptodisk enabled. Set
'GRUB_ENABLE_CRYPTODISK=y' in file /etc/default/grub

The default install allows the disk to be encrypted with the default
partition layout, so presumably it knows how to set up grub to work with
encrypted root, and it could be made to be a bit smarter about detecting
when a custom partition layout includes encryption and set up grub
appropriately?

In the meantime, if anyone has any tips on how to get the install to
succeed I'd be very grateful to hear them. :)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.445
Date: Mon Jul 27 17:19:19 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200421)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal ubiquity-20.04.15 ubuntu

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https://bugs.launchpad.net/bugs/1889107

Title:
  Installer failed to write grub to EFI, installing to root on logical
  volume inside LUKS wrapper, then later crashed

Status in grub-installer package in Ubuntu:
  New

Bug description:
  I tried to install 20.04, creating the following custom partition
  layout:

  nvme0n1        259:0    0   1.9T  0 disk  
  ├─nvme0n1p1    259:3    0   512M  0 part  /target/boot/efi
  └─nvme0n1p2    259:4    0   1.9T  0 part  
    └─cryptdata  253:0    0   1.9T  0 crypt 
      ├─vg0-root 253:1    0   1.5T  0 lvm   /target
      └─vg0-vms  253:2    0 371.2G  0 lvm   

  Everything proceeded fine until I got a popup window with the message:

    Executing 'grub-install /dev/nvme0n1' failed.
    This is a fatal error.

  In the details part of the main installer window was:

    ubuntu grub-installer: grub-install: error: attempting to install to
  encrypted disk without cryptodisk enabled. Set
  'GRUB_ENABLE_CRYPTODISK=y' in file /etc/default/grub

  The default install allows the disk to be encrypted with the default
  partition layout, so presumably it knows how to set up grub to work
  with encrypted root, and it could be made to be a bit smarter about
  detecting when a custom partition layout includes encryption and set
  up grub appropriately?

  In the meantime, if anyone has any tips on how to get the install to
  succeed I'd be very grateful to hear them. :)

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.15
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.445
  Date: Mon Jul 27 17:19:19 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200421)
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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