Dear all I recently used efibootmgr (0.5.4-12.fc17.x86_64) to inactivate a couple of UEFI boot menu entries and change the default boot order on my Thinkpad X220 (UEFI version 1.33). When I re-booted the machine afterwards, the UEFI menu showed up with the desired entries and order, however selecting the entries (both Linux and Win-7) only blanked the screen briefly and then returned to the menu. After a long troubleshooting session I found that the issue originated from the firmware's failure to properly unlock the self-encrypting SSD (Intel 520 series), which makes the drive (which holds the EFI partition) non-existent for the UEFI boot loader. All the entries in the UEFI menu, especially the paths to and within the EFI partition, were as far as I judge correct, so efibootmgr didn't do anything that would have been obviously wrong. Nevertheless, the question how efibootmgr triggered the firmware problem still bugs me (the machine was running with the same hardware/firmware configuration for 10 days before). I'm still in the process of getting familiar with the concepts and implementations of UEFI, so I was wondering whether there would any explanation for it.
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