Btw, This is a quite serious issue!

Anyway, I might have found a workaround that allows you to repair your
EFI and boot menu without opening your laptop + the shorting procedure +
firmware reinstall with FreeDOS . Buth onestly, I don't want to write
everything all over again, so for the details please have a look at
http://www.linlap.com/fujitsu_lifebook_ah532?&#comment_c5adb1445ac430630761be90a7eac560
(the comment by moerdock from 2012/11/30 04:00).

Basically, I used nvramtool to do a binary dump of the content of my
NVRAM after I had repaired everything. It *might* (again, MIGHT) be
possible for other users to write this binary dump to their NVRAM  and
it just works. I'm not sure, though. Try it at your own risk! If
something goes wrong you should be able to fix everything by doing the
shorting procedure. But once more: I don't take any responsibility if
your machine breaks :)

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https://bugs.launchpad.net/bugs/1082418

Title:
  Ubuntu Uefi install locks out bios access

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