bq 4.5 not mounting on Ubuntu 14.04

[Jeremie Tamburini]

Ubuntu 14.04 doesn't mount the BQ Aquaris 4.5 once it is connected with usb cable.
Everything works fine on Ubuntu 14.10 and 15.04.

Workaround
(found here http://ubuntuforums.org/showthread.php?t=2270325)

Installing an updated version of libmtp from this repo https://launchpad.net/~phablet-team/+archive/ubuntu/tools:

sudo add-apt-repository ppa:phablet-team/tools
sudo apt-get update
sudo apt-get upgrade

libmtp-common, libmtp-runtime and libmtp9 will be updated.

Once connected via usb, the smart phone will be browsable from the file manager and the icon will appear on the launcher.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: libmtp-common 1.1.6-20-g1b9f164-1ubuntu2
ProcVersionSignature: Ubuntu 3.16.0-41.57~14.04.1-generic 3.16.7-ckt11
Uname: Linux 3.16.0-41-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jun 22 21:09:18 2015
Dependencies:

InstallationDate: Installed on 2015-03-15 (99 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
PackageArchitecture: all
SourcePackage: libmtp
UpgradeStatus: No upgrade log present (probably fresh install)