assertion error in copy_all if /cdrom was unmounted

[Martín Coll]

Binary package hint: ubiquity

I was running the ubuntu lucid lynx alpha 3 live cd from my hdd (copied all files and made a new grub entry). I used the "sudo umount -l -r -f /cdrom" command, which would let me install lucid into another partition. when I finished filling my details, it started the partitioning and then ubiquity crashed.

ProblemType: Crash
Architecture: i386
Date: Wed Mar 10 20:18:18 2010
DistroRelease: Ubuntu 10.04
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InterpreterPath: /usr/bin/python2.6
Package: ubiquity 2.1.27
ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity gtk_ui
ProcEnviron: Error: [Errno 13] Permiso denegado: '/proc/2860/environ'
ProcVersionSignature: Ubuntu 2.6.32-14.20-generic
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']
SourcePackage: ubiquity
Title: ubiquity crashed with AssertionError in copy_all()
Uname: Linux 2.6.32-14-generic i686
UserGroups:

[Yehezkel Bernat (yehezkelshb)]

It's happened to me also, today, with updated beta2 live CD (copied to a partition in my HD, as explained).

[Ric Flomag (ricflomag)]

There is a workaround. See the initial report of bug #252667 by Mario Limonciello:

-- quote

To debug where it was trying to unmount from, adding 'exit 0' to the top of /lib/partman/commit.d/01unmount_busy allows the install to proceed.

-- end quote

[returnofnights (nightwolf-glc)]

I recreated a /casper/filesystem.size after the mksquashfs of the updated remix.

printf $(sudo du -sx --block-size=1 chroot | cut -f1) > image/casper/filesystem.size

That has allowed my remix to install without a problem, The installer should be able to preform the size detection of the mounted cdrom folder in cases where this file does not exist (such as our own stupidity) ;)

Sorry to have made more work for you debuggers, but hope this info helps other remixers who have issues with this.

[Steven (wengdi00000-gmail)]

@Ric Flomag:
good solution, worked for me on lucid 10.04.1

[Brian Murray (brian-murray)]

This seems to be a duplicate of bug 557388.