Flashing RTL8111B/RTL8111C

[robinsmidsrod]

Are you pressing Ctrl-B at the first instance you get it up during POST? That is most likely too early, as it is during the BIOS init phase. There is a diagram at networkboot.org/fundamentals that illustrates the BIOS boot process. If you're pressing Ctrl-B during the yellow process it's too early. You should do it during the blue process. If you try to use iPXE directly during the yellow process (init) then memory and such things might not be completely initialized and you get odd problems.