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 br...@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 <br...@ubuntu.com> >To: b...@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@Xenophon:~$ cd iso/kubuntu/ > bruce@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 > $command > bruce@Xenophon:~/iso/kubuntu$ 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@Xenophon:~/iso/kubuntu$ grep desktop-amd64 MD5SUMS_kubuntu-10.04-lucid > 5b256bf515ae49749ac03a1af9d407c0 *kubuntu-10.04-desktop-amd64.iso > bruce@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 Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/577684 Title: Kubuntu Lucid Lynx 10.04 Live CD failed to start To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/577684/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
