[Bug 1768288] [NEW] Ubuntu 18.04 grub install fails Asus N56v

[Sahand Vahidnia]

Public bug reported:

I am trying to install Ubuntu 18.04 on my Asus N56vv laptop. I tried both USB 3 and USB 2 flash storage drives for installation and both failed. The installation fails at final step (installation of grub). 
I have two SSD drives on /dev/sda and /dev/sdb . Disk /dev/sda has a MS Windows 10 with its boot loader. I tried to install Ubuntu on /dev/sdb1 and the boot loader on /dev/sdb (also tried /dev/sdb1) ,failed anyway. I don't want to touch /dev/sda , as it may ruin my Win 10 installation.
I had an Ubuntu 16.04 on /dev/sdb1 previously.
(I will try other things and update this thread.)
Maybe I'm doing something wrong (?)

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: ubuntu:GNOME
Date: Tue May  1 18:42:15 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic ubiquity-18.04.14 ubuntu

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https://bugs.launchpad.net/bugs/1768288

Title:
  Ubuntu 18.04 grub install fails Asus N56v

Status in grub-installer package in Ubuntu:
  New

Bug description:
  I am trying to install Ubuntu 18.04 on my Asus N56vv laptop. I tried both USB 3 and USB 2 flash storage drives for installation and both failed. The installation fails at final step (installation of grub). 
  I have two SSD drives on /dev/sda and /dev/sdb . Disk /dev/sda has a MS Windows 10 with its boot loader. I tried to install Ubuntu on /dev/sdb1 and the boot loader on /dev/sdb (also tried /dev/sdb1) ,failed anyway. I don't want to touch /dev/sda , as it may ruin my Win 10 installation.
  I had an Ubuntu 16.04 on /dev/sdb1 previously.
  (I will try other things and update this thread.)
  Maybe I'm doing something wrong (?)

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubiquity 18.04.14 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CasperVersion: 1.394
  CurrentDesktop: ubuntu:GNOME
  Date: Tue May  1 18:42:15 2018
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  ProcEnviron:
   LANGUAGE=en_US.UTF-8
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   LC_NUMERIC=C.UTF-8
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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