*** This bug is a duplicate of bug 1767703 ***
https://bugs.launchpad.net/bugs/1767703
** This bug has been marked a duplicate of bug 1767703
bootmanger : Calling 'apt-install grub-efi-amd64-signed' failed
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http://www.ubuntubuzz.com/2018/03/how-to-install-ubuntu-1804-lts-bionic-
beaver.html
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https://bugs.launchpad.net/bugs/1767664
Title:
grub2 could not be installed
To manage
Apr 28 15:11:00 ubuntu-mate grub-installer: info: Calling 'apt-install
grub-efi-amd64-signed' failed
Apr 28 15:11:29 ubuntu-mate ubiquity[1878]: Reverting lockdown of the desktop
environment.
Apr 28 15:11:29 ubuntu-mate activate-dmraid: No Serial ATA RAID disks detected
Apr 28 15:11:29
