Red Hat Bugzilla – Bug 1261559
pyanaconda.bootloader.BootLoaderError: failed to set new efi boot target. This is most likely a kernel or firmware bug.
Last modified: 2015-11-19 03:50:34 EST
This is the RHEL version of Fedora Bug #1260799
What it boils down to is that blivet needs to mount /sys/firmware/efi/efivars inside the /mnt/sysimage/ tree during installation so that efibootmgr will work correctly.
Proposed patch - https://github.com/rhinstaller/blivet/pull/221
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.