I downloaded an image for ubuntu 18 (https://releases.ubuntu.com/18.04/) yesterday, and created a startup disk on a USB using these instructions (https://ubuntu.com/download/iot/installation-media) . Today, I successfully booted from the USB, and everything seemed to be going okay until about halfway through the install. I encountered a few error messages, something about files not matching (/target/usr/lib/x86_64-linux-gnu/libibus-1.0.so.5.0.517) and another implying that my disc needed to be cleaned (Physically, which is an impossibility since I'm using a USB) and shortly after, I was informed that the install was aborted due to a corrupt disk (or something along that line). And then it offered to send a report, and opened up this page.
I've just found different instructions (https://ubuntu.com/tutorials/create-a-usb-stick-on-ubuntu#1-overview) So my next step will be to try re-doing the Live USB that way
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.15
ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.16
Architecture: amd64
CasperVersion: 1.394.3
CurrentDesktop: ubuntu:GNOME
Date: Sun May 2 10:23:07 2021
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 18.04.5 LTS "Bionic Beaver" - Release amd64 (20200806.1)
ProcEnviron:
LANGUAGE=en_CA.UTF-8
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_CA.UTF-8
LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)
The following errors can be found in UbiquitySyslog.txt which was automatically attached to this bug report:
May 2 17:22:39 ubuntu kernel: [ 1069.591142] SQUASHFS error: zlib decompression failed, data probably corrupt
May 2 17:22:39 ubuntu kernel: [ 1069.591152] SQUASHFS error: squashfs_read_data failed to read block 0x4020fe0a
It's possible you have a bad write to your media. If you're still having problems please try the option to check the integrity of the image from the installer boot menu, and if this confirms that the media is corrupt, try re-writing and/or re-downloading it.