Comment 0 for bug 1039762

I downloaded this iso: http://cdimage.ubuntu.com/daily-live/20120821/quantal-desktop-amd64.iso for installing Quantal on a second partition of my PC to carry out some tests, but during boot of the non persistent USB key (created with Startup disk creator) the boot of the USB key stalls.
I tried to download the iso twice and checked the md5sum.
I had the problem twice, first time had only a black screen and had to type ctrl+alt+f1 to get some information with ubuntu-bug and the second time got some output on a black screen but had to press ctrl+alt+f1 to launch ubuntu-bug.
I'm attaching the apport info of the second try.
I tried to install on this hardware: https://wiki.ubuntu.com/CarlaSella/lshw.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.11.22
ProcVersionSignature: Ubuntu 3.5.0-11.11-generic 3.5.2
Uname: Linux 3.5.0-11-generic x86_64
ApportVersion: 2.4-0ubuntu8
Architecture: amd64
CasperVersion: 1.321
Date: Tue Aug 21 21:06:53 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 12.10 "Quantal Quetzal" - Alpha amd64 (20120821)
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)