Ubuntu
ubiquity package

Error reading medium

Bug #1881055 reported by Kristoffer Grundström on 2020-05-28

This bug report is a duplicate of: Bug #1874662: Corrupted installation medium. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	ubiquity (Ubuntu)	New	Undecided	Unassigned

Bug Description

I downloaded the iso using a torrent and as I started the installation it crashed with an error saying that the medium is broken.

The USB stick used as an installation media works just fine with Windows 10 and Mageia (RPM based distro), but burning any iso of Ubuntu over 16.04 recreates this crash.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: ubiquity 19.10.21
ProcVersionSignature: Ubuntu 5.3.0-18.19-generic 5.3.1
Uname: Linux 5.3.0-18-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu8
Architecture: amd64
CasperVersion: 1.427
CurrentDesktop: ubuntu:GNOME
Date: Thu May 28 04:41:47 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
ProcEnviron:
LANGUAGE=sv_SE.UTF-8
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=sv_SE.UTF-8
LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

Tags:

Revision history for this message

Kristoffer Grundström (umeaman) wrote on 2020-05-28:

Casper.txt Edit (1.5 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (6.0 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.2 KiB, text/plain; charset="utf-8")
UbiquityDebug.txt Edit (10.9 KiB, text/plain; charset="utf-8")
UbiquityDm.txt Edit (16.3 KiB, text/plain; charset="utf-8")
UbiquityPartman.txt Edit (161.8 KiB, text/plain; charset="utf-8")
UbiquitySyslog.txt Edit (202.4 KiB, text/plain; charset="utf-8")

Revision history for this message

Chris Guiver (guiverc) wrote on 2020-05-28:

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 :-

May 28 02:41:35 ubuntu kernel: [ 148.018755] SQUASHFS error: zlib decompression failed, data probably corrupt
May 28 02:41:35 ubuntu kernel: [ 148.018764] SQUASHFS error: squashfs_read_data failed to read block 0x524c0

Examining the information you have given us, this does not appear to be a useful bug report so I am closing it, as it appears to be a bad ISO or faulty device (inc. bad write-to-device). If you believe I'm in error, please leave a comment explaining why and change the status back to 'New'. I suggest you verify your ISO download, and note the validation of your ISO before install to ensure a good download & write.

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