Just confirming (for Mario Limonciello) one of the systems that drop to livecd environment has ATI Radeon Graphics, I'm attaching the syslog and debug (with debug-ubiquity) for that one. too.
** Attachment added: "installer/debug with debug-ubiquity enabled" https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/706117/+attachment/1804863/+files/debug -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/706117 Title: Installation fails using preseed file and network install -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs