Messed up display during boot of USB live key

[Carla Sella]

While booting my PC (http://wiki.ubuntu-it.org/CarlaSella/lshw) with a live persistent USB Key with Ubuntu Quantal Beta 2 (http://cdimage.ubuntu.com/daily-live/20120926/quantal-desktop-amd64.iso) after the purple background with the white Ubuntu logo I get a messed up display, cannot do anything, I hear the startup sound but everything is so messed I cannot continue with startup of Ubuntu, see attached picture.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.12.5
ProcVersionSignature: Ubuntu 3.5.0-15.23-generic 3.5.4
Uname: Linux 3.5.0-15-generic x86_64
ApportVersion: 2.5.2-0ubuntu4
Architecture: amd64
CasperVersion: 1.324
Date: Thu Sep 27 19:45:15 2012
InstallCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64 (20120926)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Carla Sella (carla-sella)]

I think the problem is due to my Nvidia video card.

[Carla Sella (carla-sella)]

Same happens with live USB non persistent key.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1057738

[Brian Murray (brian-murray)]

This isn't a bug with the installer (ubiquity) rather as you suspected rather something with the Xorg environment. Subsequently, I'm moving the bug to xorg.

[Carla Sella (carla-sella)]

This bug is a duplicate of bug #1043518.
I solved my problem with today's ISO: http://cdimage.ubuntu.com/daily-live/20120929/quantal-desktop-amd64.iso.