Your log files tarball didn't include the primary useful log, which is
syslog.
Nevertheless, I bet this is bug 702707 ...
** Also affects: grub-installer (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/705204
Title:
[NATTY] Dailybuild 19/11 fails to install grub on UEFI based Intel
weybridge SDP
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