Encrypted installation crashes . Failed to mount the target: /target

[Blümchen Blau]

The installation of a dm-crypted system with a partition setup as below crashes when installing in VBox as on a Dell Latitude E4300.

unencrpyted:
250 MB ext4 as /boot
encrypted:
12 GB btrfs as /
8 GB as SWAP
80 GB as /home
unencrypted:
150 GB ext4

Seems as the installer is crashing when trying to do the partitioning in the background (shortly after choice of location).

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubiquity 2.13.1
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.2-0ubuntu2
Architecture: amd64
CasperVersion: 1.328
Date: Fri Nov 9 19:49:47 2012
InstallCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20121109)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=de_AT.UTF-8
 TERM=linux
 PATH=(custom, no user)
 LANG=de_AT.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Blümchen Blau (bluemchen-blau)]

Same crash as ext4 is fs for /

[Blümchen Blau (bluemchen-blau)]

The installation with settings as listed in initial report works flawless with the alternate installer of Lubuntu 13.04. (I want my installer back!)

[Sasa Paporovic (melchiaros)]

In UbiquitySyslog.txt:

Nov 9 18:47:04 ubuntu ubiquity: Traceback (most recent call last):
Nov 9 18:47:04 ubuntu ubiquity: File "/usr/share/ubiquity/install.py", line 720, in <module>
Nov 9 18:47:04 ubuntu ubiquity: install = Install()
Nov 9 18:47:04 ubuntu ubiquity: File "/usr/share/ubiquity/install.py", line 74, in __init__
Nov 9 18:47:04 ubuntu ubiquity: 'Failed to mount the target: %s' % str(self.target)
Nov 9 18:47:04 ubuntu ubiquity: AssertionError: Failed to mount the target: /target
Nov 9 18:49:19 ubuntu wpa_supplicant[2280]: wlan0: WPA: Group rekeying completed with 06:1f:3f:1b:d0:c6 [GTK=TKIP]
Nov 9 18:49:47 ubuntu ubiquity:
Nov 9 18:49:47 ubuntu ubiquity: (apport-gtk:21885): Gtk-WARNING **: Locale not supported by C library.
Nov 9 18:49:47 ubuntu ubiquity: #011Using the fallback 'C' locale.

[Blümchen Blau (bluemchen-blau)]

Might affect 12.10 too, as 13.04 is veeery young.

[Desmond Duval (haydre)]

I'm not sure this is actually related to the fact that the partitions are encrypted, so much as having a separate partitions for /home partitioned as btrfs. I'm running into an almost identical problem, but not encrypted.

[Dimitri John Ledkov (xnox)]

One must have "/boot" unecrypted (something like 200MB ext4 should be plenty).
The fact that manual partitioning is allowing you to start installation is worrying as the underlying partman has safety check to check that there is a /boot setup, when required.