[Bug 1871689] Re: Installer hangs idle before populating root-fs with directories, "Saving installed packages..."

[TJ]

Solution:

Create all the mountpoints in the root-fs when doing a manual install.

e.g:

sudo mkdir -p /target/{proc,sys,dev/pts,var,home,boot,usr/local}

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Title:
  Installer hangs idle before populating root-fs with directories,
  "Saving installed packages..."

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Trying to install the Xubuntu 20200408 amd64 ISO from USB, Try (safe
  graphics mode) on Lenovo E495 (AMD Ryzen 7 mobile CPU) - not sure if
  the CPU might have something to do with this but probably not.

  Nothing obvious in the logs I've checked.

  Currently the system has been sitting idle for almost 2 hours with the
  ubiquity GUI showing "Saving installed packages...".

  I'm doing a custom partitioning that I've done for years.

  Before the installer is started I use gdisk to create the EFI-SP and 2
  dm-crypt partitions for /boot/ and LVM respectively.

  I use cryptsetup luksFormat --type=xxx ... on the partitions then open
  them as LUKS_BOOT and LUKS_VG respectively.

  I create the VG and several LVs for rootfs, var, home, usr_local.

  I format each as ext4 with labels matching the LV name, and format
  LUKS_BOOT as well.

  I format the EFI-SP as vfat with FAT16.

  In partman's "Something Else" I then select each LV and set its
  mountpoint and do not choose to format it (again) since I wish to
  retain the labels.

  I get passed the User Info questions then it idles whilst showing
  "Saving installed packages...".

  The root file-system directory structure hasn't been created:

  root at xubuntu:~# mount | grep rootfs
  /dev/mapper/ELLOE00-rootfs on /tmp/tmp.woX6753mbL type ext4 (rw,relatime)

  root at xubuntu:~# find /tmp/tmp.woX6753mbL/
  /tmp/tmp.woX6753mbL/
  /tmp/tmp.woX6753mbL/lost+found

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.9
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu24
  Architecture: amd64
  CasperVersion: 1.443
  Date: Wed Apr  8 19:36:52 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed quiet splash ---
  LiveMediaBuild: Xubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200408)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=C.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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