Comment 19 for bug 1251193

Thank you for comment Christopher
I have treid that already too, but , also failed to install it
I have tested for doing it by these after adding trusty-proposed repository

first , I tried
* sudo apt-get update; sudo apt-get upgrade -s
for checkinng upgrade , but there was no upgradable message from the terminal

so that I tried directly to upgrade to the system

* sudo apt-get update
* sudo apt-get install unity
* sudo apt-get install unity-services
* sudo apt-get upgrade
* sudo apt-get dist-upgrade

but, it said "unity is alreadya newiest package version" , "unity-services is already a newiest package version"
Thus, After that I tried to firgure out clearly by

* sudo aptitude -t trusty-proposed

and, I found one unsatisfied dependency package : libunity-core-6.0-9 ( =7.2.1+14.04.20140513-0ubuntu1)
from the terminal

I will re-install the ubuntu 14.04 for testing at the fresh install
and, I will check it again
Thank you for helping to make it clear
Thank you all