grub failed to install and aborted installation

[rajesh]

While installing lubuntu bionic-beaver the installer crashed with the error that it wasa unable to install grub to /dev/mmcblk1.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 17.10.10
ProcVersionSignature: Ubuntu 4.13.0-17.20-generic 4.13.8
Uname: Linux 4.13.0-17-generic x86_64
ApportVersion: 2.20.8-0ubuntu2
Architecture: amd64
CasperVersion: 1.387
Date: Tue Dec 5 23:42:06 2017
LiveMediaBuild: Lubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171203)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

Strange. There was an IO error trying to update the EFI variables. I'm not sure if it matters or if it is just odd, but the system tried to install the 32 bit grub even though you appear to have a 64 bit system.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Barrie Hope (barriehope)]

This has happened to me on two occasions, once on an Apple Macbook 2009 and once on an Intel NUC, both using Mate 18.04 Beta 2.