lubuntu 16.10 installation bug grub/lenovo z710

[Bensuperpc]

lubuntu, bug with lenovo z710(i7 4710qm,8go ddr3, 840m, ssd sandisk 256GB, dual boot with windows 10 64bit

I have similar bug with ubuntu server 16.04 on eeepc 701...

Bensuperpc,

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ubiquity 16.10.8
ProcVersionSignature: Ubuntu 4.4.0-9134.53-generic 4.4.15
Uname: Linux 4.4.0-9134-generic x86_64
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
CasperVersion: 1.378
Date: Mon Aug 29 00:03:57 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/lubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Lubuntu 16.10 "Yakkety Yak" - Alpha amd64 (20160824)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)