Public bug reported:
In focal 20.04.02 the ubiquity-gtk installer (20.04.15.11/focal-updates)
always crashes after the partition step.
Although this seems to be an old bug, I could not find a relevant bug
report so far.
I am having this issue when installing Ubuntu 20.04 to removable media
from an existing Ubuntu 20.04 system. I could reproduce the issue on a
PC in UEFI mode and on another one in BIOS mode. Before reporting this
bug, I tested the installer on both Live USB media and internal disks.
How to reproduce?
1. The install medium needs to be writable (i.e. no CD/DVD) and contain a
mounted EFI partition (e.g. /dev/sda1), while the target presumably needs to be
a removable medium or a secondary disk.
2. sudo --preserve-env=DBUS_SESSION_BUS_ADDRESS,XDG_RUNTIME_DIR sh -c 'ubiquity
gtk_ui'
3. In the ubiquity installer create a GPT partition on the target medium (e.g.
/dev/sdb) containing an EFI partition (e.g. /dev/sdb1) and a root partition
(e.g. /dev/sdb2), and set the Grub target ("boot disk") accordingly.
4. The installer will ask for confirmation, stating that the partition table of
both disks will change and that the two newly created partitions will be
formatted. In case of an existing swap partition on the primary disk, this
partition will also be formatted (which I consider another bug).
5. After the crash, you can notice that
a. the new system has been partially installed, as /target (e.g. /dev/sdb2)
is mounted and contains 329 MB
b. the EFI partition of the install medium or primary disk (e.g. /dev/sda1)
has been unmounted from /boot/efi and remounted to /target/boot/efi
c. the target EFI partition (e.g. /dev/sdb1) has been created and formatted,
but is unmounted and empty.
$ cat /target/etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb2 during installation
UUID=76ecfd0f-dae5-4801-9db0-7d8bc8d20b8f / ext4
errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
UUID=A815-6B37 /boot/efi vfat umask=0077 0 1
# swap was on /dev/sda6 during installation
UUID=c2e0cb67-23de-4ab3-be19-4123e6229ade none swap sw
0 0
$ sudo du -shx /target/* | sort -h
4,0K /target/home
4,0K /target/lib64
4,0K /target/media
4,0K /target/mnt
4,0K /target/opt
4,0K /target/proc
4,0K /target/srv
4,0K /target/sys
4,0K /target/tmp
4,0K /target/writable
12K /target/dev
12K /target/root
16K /target/lost+found
16K /target/meta
84K /target/snap
96K /target/run
3,8M /target/etc
4,1M /target/boot
9,7M /target/sbin
9,8M /target/var
14M /target/bin
48M /target/lib
240M /target/usr
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.11
ProcVersionSignature: Ubuntu 5.8.0-51.57~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-51-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.17
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Apr 30 00:34:13 2021
InstallCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz root=UUID=E6BD-0CD8
file=/cdrom/preseed/ubuntu.seed maybe-ubiquity debian-installer/language=de
keyboard-configuration/layoutcode=de
iso-scan/filename=/ubuntu-18.10-desktop-amd64.iso boot=casper persistent
noprompt quiet splash --
InstallationDate: Installed on 2018-12-11 (870 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
SourcePackage: ubiquity
UpgradeStatus: Upgraded to focal on 2020-10-26 (185 days ago)
** Affects: ubiquity (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal ubiquity-18.10.12
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https://bugs.launchpad.net/bugs/1926672
Title:
ubiquity-gtk installer crashes in focal 20.04.02 after partitioning
due to existing EFI partition
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