can't install grub
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| grub-installer (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Bug Description
can't install grub. secureboot disabled, legacy enabled (and disabled), previous versions of lubuntu not working either.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.18.8.9
ProcVersionSign
Uname: Linux 3.19.0-25-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CasperVersion: 1.340.2
Date: Sat Jan 23 20:06:31 2016
InstallCmdLine: BOOT_IMAGE=
LiveMediaBuild: Lubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
ProcEnviron:
LANGUAGE=
TERM=linux
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_CA.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

It appears that your installation medium is corrupt; you will need to recreate it and may want to verity it using the "check disc" option at the boot menu. From your logs:
Failed to fetch cdrom://Lubuntu 14.04.3 LTS _Trusty Tahr_ - Beta amd64 (20150805) /pool/main/ e/efibootmgr/ efibootmgr_ 0.5.4-7ubuntu1. 2_amd64. deb Hash Sum mismatch