EFI boot on Dell PowerEdge R610

[Johan Hattne]

Dear all;

I've been trying to boot the 6.7 installation media from USB via EFI on 
a Dell PowerEdge R610.  The screen goes blank and then the thing resets 
(so no kernel output or anything).  I can boot the same stick via BIOS.

I've been searching for a while without results.  Firmware settings look 
sane to me.  Is this something anybody has seen before?  Any hint on 
where I could even start looking for problems would be very much 
appreciated!

// Cheers; Johan