I've successfully installed Qubes on a Thinkpad T500 with 4GB RAM. I have enabled both VT-d and an unspecified Virtualization Technology in the BIOS. (Of note, enabling the "Security chip" and TXT cause the install to fail -- booting to the DVD gives me a blinking purple cursor).
So I install. Everything goes fine. Then I reboot and... nothing.
tested the media
installed in low-graphics mode
run a memtest
Best guess: something may be going wrong in the partioning of the hard disk. I am overwriting an existing encrypted LVM Linux installation. I want to wipe the whole disk and reinstall Qubes.
Would appreciate any suggestions!