trying to install lubuntu on a f***g Dell desktop.

[Olivier]

Lucky it's not my computer...
It seems there is a problem with UEFI boot or partitioning. As it did not work when trying LVM auto partitioning I partitioned manually (only 1 partition for /), but still GRUB does not install properly.
I guess I'd better install it in legacy (not UEFI) mode...

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: ubiquity 17.04.9
ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
Uname: Linux 4.10.0-19-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
CasperVersion: 1.380
Date: Wed Jul 12 23:47:47 2017
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/lubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Lubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
ProcEnviron:
 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)