[Bug 1907793] [NEW] First install of Mate 20.1. At the end " install GRUB /dev/sda/ " crashed. It seems an UBIQUITY bug. Fatal error. Install failed What I have to do ?

[Gianfranco]

Public bug reported:

 Description:	Ubuntu 20.10
Release:	20.10

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ubiquity 20.10.13
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
Uname: Linux 5.8.0-25-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
CasperMD5CheckResult: skip
CasperVersion: 1.455
Date: Fri Dec 11 10:12:39 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu-MATE 20.10 "Groovy Gorilla" - Release amd64 (20201022)
RebootRequiredPkgs:
 linux-image-5.8.0-25-generic
 linux-base
 linux-base
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug groovy ubiquity-20.10.13 ubuntu-mate

** Attachment added: "syslog&partman.7z"
   https://bugs.launchpad.net/bugs/1907793/+attachment/5442731/+files/syslog%26partman.7z

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https://bugs.launchpad.net/bugs/1907793

Title:
  First install of Mate 20.1. At the end " install GRUB /dev/sda/ "
  crashed. It seems an UBIQUITY bug. Fatal error. Install failed What I
  have to do ?

Status in ubiquity package in Ubuntu:
  New

Bug description:
   Description:	Ubuntu 20.10
  Release:	20.10

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: ubiquity 20.10.13
  ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
  Uname: Linux 5.8.0-25-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu50
  Architecture: amd64
  CasperMD5CheckResult: skip
  CasperVersion: 1.455
  Date: Fri Dec 11 10:12:39 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu-MATE 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  RebootRequiredPkgs:
   linux-image-5.8.0-25-generic
   linux-base
   linux-base
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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