I tried to boot off the Qubes Installation disk (Qubes-R4.2.3-x86_64.iso). It starts to boot, the screen goes blank and then the computer reboots, just like trying to boot off a 6.1… kernel.
I expect the answer may be that the Lenovo Thinkpad W540 stopped being supported some time back when they introduced the 6.1… kernel and that the current installer uses a 6.X… kernel. (see new thread Is the Lenovo Thinkpad W540 still supported?)
Is there a tweak that can be done to make this work? Is there any hope of getting this to work or has support for this hardware ceased?