fresh install error

[Guillermo Nicora]

I've let PC alone; screen was black, I suppose that energy saver activates

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.10.16
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
ApportVersion: 2.0.1-0ubuntu5
Architecture: amd64
CasperVersion: 1.315
Date: Fri Apr 27 22:54:06 2012
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcEnviron:
 LANGUAGE=es_AR.UTF-8
 TERM=linux
 PATH=(custom, no user)
 LANG=es_AR.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Apr 28 00:54:17 ubuntu plugininstall.py: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (2)
Apr 28 00:54:17 ubuntu plugininstall.py:

[Jean-Baptiste Lallement (jibel)]

Thanks for your report

Error from the logs
"""
Apr 28 00:53:55 ubuntu ubiquity: Preparing to replace firefox-locale-en 11.0+build1-0ubuntu4 (using .../firefox-locale-en_12.0+build1-0ubuntu0.12.04.1_amd64.deb) ...
Apr 28 00:53:56 ubuntu ubiquity: dpkg: unrecoverable fatal error, aborting:
Apr 28 00:53:56 ubuntu ubiquity: fork failed: Cannot allocate memory
Apr 28 00:54:15 ubuntu ubiquity: Error in function:
Apr 28 00:54:15 ubuntu ubiquity:
Apr 28 00:54:17 ubuntu plugininstall.py: Exception during installation:
Apr 28 00:54:17 ubuntu plugininstall.py: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (2)
Apr 28 00:54:17 ubuntu plugininstall.py:
"""

Your system has limited physical memory (784MB) You can install Ubuntu by selecting 'Install Ubuntu' instead of 'Try Ubuntu' that will load the installer directly and will save the memory used by the live session or use an i386 image instead of amd64.