My girlfriend is running Ubuntu 14.04 on her entry level laptop. Ubuntu uses more system resources than some other desktop environments, particularly MATE.
I'd like to increase the performance of her system by installing MATE on her computer but it occurred to me I could just install the mate-desktop package on her machine and have her log in with that.
Would fewer resources be used if I wiped Ubuntu and install Ubuntu MATE or would selecting MATE from the DE selection window in lightdm at login be just as lightweight?
Ubuntu MATE will surely use less resources than just choosing MATE from DE since Ubuntu-Desktop installs many packages with unity and Ubuntu-MATE has very few dependencies.
Thus if you just install MATE DE in default Ubuntu, the packages which were installed with unity will be there and some of them maybe running in background, thereby using more resources than Ubuntu MATE fresh install.
But if you want to convert Ubuntu into Ubuntu MATE without wiping you may follow steps below, it will have the same effect as that of installing a fresh instance of Ubuntu MATE.
Also install gdm by this command :
Then you may remove ubuntu-desktop by following command :
An alternative to Ubuntu MATE is lubuntu which is even light-weight than Ubuntu MATE, choice is yours.