Blank screen when wimboot starts

[robinsmidsrod]

You forgot to mention which version of WinPE you're using. I've heard rumors that the newest one, based on Windows 8 or 8.1 is giving people some trouble. You might have more luck with the one based on the Windows 7 (can't recall which version number it has in WinPE terms).

But ultimately, it seems very odd that you're able to load everything successfully if you disable the sanhook line. I'd try to packet capture the communication between the iPXE client and the iscsi server to figure out what might be going on there. If you're able to increase the debugging level on your iscsi server, that might help too. You could also try to recompile ipxe with DEBUG=iscsi,scsi,int13 and see if it gives any clues. We could also be dealing with some strange windows issue, which most likely must be debugged using windbg. That is not something I'm familiar with, unfortunately.