[Bug 577684] Re: Kubuntu Lucid Lynx 10.04 Live CD failed to start

[Bruce Miller]

Definitive proof does not exist.
 
But I had problems with development and one release version of one release on several machines. I have not had similar problems that I can recall with any of the machines or with other versions of Ku/Ubuntu before or since. I routinely compared the MD5 of the download and of the burned CD, that is, at each step of the way.
 
This is why I am sceptical that one bad CD drive was responsible. 

--
Bruce Miller, Ottawa, Ontario, Canada
bruce at brmiller.ca; (613) 745-1151


In archaeology you uncover the unknown. In diplomacy you cover the known.
attributed to Thomas Pickering, retired US diplomat, born 1931

From: Brian Murray <brian at ubuntu.com>
>To: bugs at brmiller.ca
>Sent: Friday, October 21, 2011 6:03:28 PM
>Subject: [Bug 577684] Re: Kubuntu Lucid Lynx 10.04 Live CD failed to start
>
>It could also have been a bad CD drive.  Do you have any information to
>update this bug?
>
>** Changed in: casper (Ubuntu)
>      Status: New => Incomplete
>
>-- 
>You received this bug notification because you are subscribed to the bug
>report.
>https://bugs.launchpad.net/bugs/577684
>
>Title:
>  Kubuntu Lucid Lynx 10.04 Live CD failed to start
>
>Status in “casper” package in Ubuntu:
>  Incomplete
>
>Bug description:
>  Binary package hint: casper
>
>  to the best of my ability to judge, have burned a good CD:
>
>  bruce at Xenophon:~$ cd iso/kubuntu/
>  bruce at Xenophon:~/iso/kubuntu$ cat ~/bin/rawread
>  #!/bin/sh
>
>  device=$1
>
>  blocksize=`isoinfo -d -i $device | grep "^Logical block size is:" | cut -d " " -f 5`
>  if test "$blocksize" = ""; then
>        echo catdevice FATAL ERROR: Blank blocksize >&2
>        exit
>  fi
>
>  blockcount=`isoinfo -d -i $device | grep "^Volume size is:" | cut -d " " -f 4`
>  if test "$blockcount" = ""; then
>        echo catdevice FATAL ERROR: Blank blockcount >&2
>        exit
>  fi
>
>  command="dd if=$device bs=$blocksize count=$blockcount conv=notrunc,noerror"
>  echo "$command" >&2
>  $command
>  bruce at Xenophon:~/iso/kubuntu$ rawread /dev/sr0 | md5sum
>  dd if=/dev/sr0 bs=2048 count=357047 conv=notrunc,noerror
>  357047+0 records in
>  357047+0 records out
>  731232256 bytes (731 MB) copied, 138.253 s, 5.3 MB/s
>  5b256bf515ae49749ac03a1af9d407c0  -
>  bruce at Xenophon:~/iso/kubuntu$ grep desktop-amd64 MD5SUMS_kubuntu-10.04-lucid
>  5b256bf515ae49749ac03a1af9d407c0 *kubuntu-10.04-desktop-amd64.iso
>  bruce at Xenophon:~/iso/kubuntu$
>
>  1. Whenever I start this CD, it prompts for language and prompts user to "try Kubuntu without installing."
>  2. Splash screen appears and machine hangs. On one occasion, left machine for several hours; remained hung at splash screen.
>  3. Machine responds to Ctrl-Alt-Del.
>
>  Other comments:
>  1. Like many Linux amateurs, I am an incurable experimenter, Have booted several dozen install CDs in this machine; this is first *buntu CD which has failed to load (others have sometimes failed to install, but that was during development and was to be expected). This incident occurred with *_release_* version. First observed on release day (2010-04-29, repeated today (2010-05-09)
>  2. Was also unable to "test CD for defects". Transcribed following error message by hand:
>  (initramfs) mount: mounting /dev/lopp0 on //filesystem/squashfs failed: Input/output error
>  Can not mount /dev/loop0 (/cdrom/casper/filesystem.squashfs) on //filesystem.squashfs
>  3. Kubuntu Lucid Lynx 10.04 alternate CD started (and installed) without incident.
>  4. During development cycle of 10.04, not all daily builds would install, but no CD ever failed to start
>  5. hardware is "white box", but contains nothing out of the ordinary.
>
>  All signs point to a bad CD, but I checked MD5SUM of .iso after
>  downloading, and MD5SUM of CD after burning. If MD5SUMs match, am I
>  not guaranteed an accurate CD?
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 10.04
>  Package: casper (not installed)
>  ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
>  Uname: Linux 2.6.32-22-generic x86_64
>  NonfreeKernelModules: nvidia
>  Architecture: amd64
>  Date: Sun May  9 00:26:08 2010
>  InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427)
>  ProcEnviron:
>  LANGUAGE=
>  PATH=(custom, user)
>  LANG=en_US.UTF-8
>  SHELL=/bin/bash
>  SourcePackage: casper
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/ubuntu/+source/casper/+bug/577684/+subscriptions
>
>
>

-- 
You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/577684

Title:
  Kubuntu Lucid Lynx 10.04 Live CD failed to start

Status in “casper” package in Ubuntu:
  Incomplete

Bug description:
  Binary package hint: casper

  to the best of my ability to judge, have burned a good CD:

  bruce at Xenophon:~$ cd iso/kubuntu/
  bruce at Xenophon:~/iso/kubuntu$ cat ~/bin/rawread
  #!/bin/sh

  device=$1

  blocksize=`isoinfo -d -i $device | grep "^Logical block size is:" | cut -d " " -f 5`
  if test "$blocksize" = ""; then
        echo catdevice FATAL ERROR: Blank blocksize >&2
        exit
  fi

  blockcount=`isoinfo -d -i $device | grep "^Volume size is:" | cut -d " " -f 4`
  if test "$blockcount" = ""; then
        echo catdevice FATAL ERROR: Blank blockcount >&2
        exit
  fi

  command="dd if=$device bs=$blocksize count=$blockcount conv=notrunc,noerror"
  echo "$command" >&2
  $command
  bruce at Xenophon:~/iso/kubuntu$ rawread /dev/sr0 | md5sum
  dd if=/dev/sr0 bs=2048 count=357047 conv=notrunc,noerror
  357047+0 records in
  357047+0 records out
  731232256 bytes (731 MB) copied, 138.253 s, 5.3 MB/s
  5b256bf515ae49749ac03a1af9d407c0  -
  bruce at Xenophon:~/iso/kubuntu$ grep desktop-amd64 MD5SUMS_kubuntu-10.04-lucid
  5b256bf515ae49749ac03a1af9d407c0 *kubuntu-10.04-desktop-amd64.iso
  bruce at Xenophon:~/iso/kubuntu$

  1. Whenever I start this CD, it prompts for language and prompts user to "try Kubuntu without installing."
  2. Splash screen appears and machine hangs. On one occasion, left machine for several hours; remained hung at splash screen.
  3. Machine responds to Ctrl-Alt-Del.

  Other comments:
  1. Like many Linux amateurs, I am an incurable experimenter, Have booted several dozen install CDs in this machine; this is first *buntu CD which has failed to load (others have sometimes failed to install, but that was during development and was to be expected). This incident occurred with *_release_* version. First observed on release day (2010-04-29, repeated today (2010-05-09)
  2. Was also unable to "test CD for defects". Transcribed following error message by hand:
  (initramfs) mount: mounting /dev/lopp0 on //filesystem/squashfs failed: Input/output error
  Can not mount /dev/loop0 (/cdrom/casper/filesystem.squashfs) on //filesystem.squashfs
  3. Kubuntu Lucid Lynx 10.04 alternate CD started (and installed) without incident.
  4. During development cycle of 10.04, not all daily builds would install, but no CD ever failed to start
  5. hardware is "white box", but contains nothing out of the ordinary.

  All signs point to a bad CD, but I checked MD5SUM of .iso after
  downloading, and MD5SUM of CD after burning. If MD5SUMs match, am I
  not guaranteed an accurate CD?

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: casper (not installed)
  ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
  Uname: Linux 2.6.32-22-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Sun May  9 00:26:08 2010
  InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427)
  ProcEnviron:
   LANGUAGE=
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: casper

To manage notifications about this bug go to:
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