Ubuntu
ubiquity package

install "blocked" by unnecessary unmount-partition attempt

Bug #598743 reported by james
28
This bug affects 6 people
Affects Status Importance Assigned to Milestone
ubiquity (Ubuntu)
Confirmed
Medium
Unassigned
Nominated for Lucid by Charlie Kravetz

Bug Description

Binary package hint: ubiquity

This is specifically with xubuntu-10.04-desktop-i386.iso, booted from grub2 with:

menuentry "Xubuntu Live 10.04 32bit" {
 loopback loop (hd0,2)/xubuntu-10.04-desktop-i386.iso
 linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/xubuntu-10.04-desktop-i386.iso file=(loop)/preseed/xubuntu.seed --
 initrd (loop)/casper/initrd.lz
}

So the xubuntu iso is on the target partition, the partition table is NOT to be changed, and the partition has already been formatted.

Where /var/log/syslog says:

 Step_before = stepReady
 progress_loop()
 umount: /isodevice: device is busy

then ubiquity is trying to unmount the partition, even though there is no need for this. Even worse, when umount fails, the installation is effectively "blocked" from continuing. That's a "showstopper" bug during an install.

Adding 'exit 0' to the top of /lib/partman/commit.d/01unmount_busy allows the install to proceed.

I assume that some test should be added to 01unmount_busy, so that this test is not made when the partition table is unchanged.

James

Tags: lucid maverick
Revision history for this message
Charlie Kravetz (cjkgeek) wrote :

 Thanks for reporting this bug and any supporting documentation. Since this bug has enough information provided for a developer to begin work, I'm going to mark it as confirmed and let them handle it from here. Thanks for taking the time to make Ubuntu better!

Changed in ubiquity (Ubuntu):
importance: Undecided → Medium
status: New → Confirmed
Revision history for this message
Charlie Kravetz (cjkgeek) wrote :

This issue applies to Ubuntu ISO's as well as Xubuntu. It is a bug in Ubiquity, per the duplicate.

tags: added: lucid maverick
Revision history for this message
Tv (tv42) wrote :

I had this trigger while doing an install from /dev/sda4 (USB stick image dd'ed there) to /dev/sda3. I had prepared the partition table beforehand, so it didn't really need everything on /dev/sda to be unmounted.

This is going to hurt every new MacbookAir3,1 / MacbookAir3,2 owner that tries to install Ubuntu without using a Superdrive.

Revision history for this message
Que mas da (yetro69) wrote :

I´m newbie
I have not cdrom device, my bios doesn´t boot from usb. NO WAY to install ubuntu because this bug.

3 weeks searching a walkarround.

I think that "importance: Undecided → Medium" is not enought for this bug.

I´m not a progammer, but i think this bug isn´t too dificult to solve. And a lot o newbies like me can not install ubuntu.

Thank you very much for the walkarround, it works. :)

Revision history for this message
james (james-nurealm) wrote :

2011-07-14 11:47:41 turbooster marked as duplicate 684280

There is a connotation of temporality associated with the term "duplicate", in which a "duplicate" would otherwise be considered to arise "after", not "before", some similar item or event. This "duplicate" precedes bug 684280.

James

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