install crashes

[monasterio]

crashes midway of install

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.6
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: ubuntu:GNOME
Date: Thu Aug 12 00:25:00 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Reviewing your log files attached to this bug report it seems that there is a problem with your installation media (CD/DVD). You can verify the integrity of the Ubuntu ISO files you downloaded by following the instructions at https://help.ubuntu.com/community/HowToMD5SUM. You might also retry your installation with new media. In the event that is is not in fact an error with your installation media please set the bug's status back to New. Thanks and good luck!

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Chris Guiver (guiverc)]

Thank you for taking the time to report this issue and helping to make Ubuntu better.

This package failure looks like it was caused by bad ISO download, corrupted install media, or device failure. eg. look in the logs and you'll see messages like these :-

Aug 12 07:24:43 ubuntu kernel: [ 242.141151] SQUASHFS error: zlib decompression failed, data probably corrupt
Aug 12 07:24:43 ubuntu kernel: [ 242.141158] SQUASHFS error: squashfs_read_data failed to read block 0x2d7e90fe
Aug 12 07:24:43 ubuntu kernel: [ 242.141424] SQUASHFS error: zlib decompression failed, data probably corrupt
Aug 12 07:24:43 ubuntu kernel: [ 242.141427] SQUASHFS error: squashfs_read_data failed to read block 0x2d7e90fe

Examining the information it appears to be a bad ISO or faulty device (inc. bad write-to-device). The bot reply refers to CD/DVD which refers to whatever media you installed from (ie. applies even if using HDD/SSD/thumb-drive/flash-memory-card/CD/DVD). I suggest you verify your ISO download, and validate the write of ISO to install media before trying to install.

Possibly useful:
- https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu#0
- https://help.ubuntu.com/community/Installation/CDIntegrityCheck

[Launchpad Janitor (janitor)]

[Expired for ubiquity (Ubuntu) because there has been no activity for 60 days.]