Installation crashes ( using a Linux Format CD on Ubuntu 18.04 )

[Mario Antona]

Every time I try to install ubuntu the installer crashes.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.5
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
CasperVersion: 1.393
CurrentDesktop: ubuntu:GNOME
Date: Wed Sep 19 16:32:50 2018
InstallCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz.efi iso-scan/filename=/Ubuntu/bionic-desktop-amd64.iso file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180413)
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Paul White (paulw2u)]

We are sorry that we do not always have the capacity to review all reported bugs in a timely manner.

The following errors can be found in UbiquitySyslog.txt which was automatically attached to this bug report:

Sep 19 15:32:32 ubuntu kernel: [ 454.112420] SQUASHFS error: zlib decompression failed, data probably corrupt
Sep 19 15:32:32 ubuntu kernel: [ 454.112425] SQUASHFS error: squashfs_read_data failed to read block 0xec9a8b0

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.

See also: https://help.ubuntu.com/community/SquashfsErrors