package grub-pc 2.02~beta2-9ubuntu1.13 failed to install/upgrade: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 127

[dirt]

fail update fai upgrade linux kernel 4.4.07

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: grub-pc 2.02~beta2-9ubuntu1.13
ProcVersionSignature: Ubuntu 4.4.0-45.66~14.04.1-generic 4.4.21
Uname: Linux 4.4.0-45-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
Date: Thu Dec 1 15:02:38 2016
DuplicateSignature: package:grub-pc:2.02~beta2-9ubuntu1.13:il sottoprocesso installato script di post-installation ha restituito lo stato di errore 127
ErrorMessage: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 127
InstallationDate: Installed on 2015-10-11 (416 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
InvalidGrubScript: /etc/default/grub
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-45-generic root=UUID=07f0e311-830c-45db-a535-293fdba70e8a ro quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.7
 apt 1.0.1ubuntu2.15
SourcePackage: grub2
Title: package grub-pc 2.02~beta2-9ubuntu1.13 failed to install/upgrade: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 127
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

You modified your /etc/default/grub file and put a space after the equals on this line:

GRUB_CMDLINE_LINUX= ""

You need to remove the space.