Thanks for the replies, folks.
I just tried the DVD again, and I got the same results.
I made the DVD from this VLocity 7.x file:
VL64-7.0.1-STD-FINAL.iso with an md5 checksum of a83ee1b1dae6ebbf6c1afa0aebcf3e7b.
When I examine the contents of the iso, I do not see the files I normally expect to find on a true UEFI-bootable disk. These would typically be one or more files with an .efi suffix, generally found in a directory named "EFI" or the like. The VL64 iso that I extracted contained no files of this nature that i could find.
I'm booting UEFI only (my MB offers Legacy BIOS, UEFI, or Both). This option has worked for numerous UEFI-capable boot disks that I've made from Linux installation ISOs.
Am I using the wrong file or something? I have a 64-bit machine. The machine, by the way, is a Thinkpad 420.
Here's the EFI firmware info:
EFI Specification Revision : 2.0
EFI Vendor : Lenovo
EFI Revision: 0.5136
Here's the part of my dmidecode output that pertains to the BIOS:
Version: 83ET71WW (1.41 )
Release Date: 07/23/2012
Runtime Size: 128 kB
ROM Size: 8192 kB
PCI is supported
PNP is supported
My motherboard will permit booting via BIOS (which it calls "Legacy") as well as EFI, but booting Legacy defeats the purpose, since my experience has been that an EFI installation requires booting the install disk or USB stick via EFI.
I'm encouraged that some of you have managed to boot VL's install disks using EFI; I'm wondering if I'm using a different iso or something. Please advise. Thanks.