In this tutorial we will show you the process to enable low grahics mode in Unity 7. It will works if you have unity stack updates installed. Latest Stable Release Update (SRU) is only rolling out to Ubuntu 16.04 LTS users. Big unity desktop updates on way to ubuntu 16.04 LTS users.
Use following command to enable low graphics mode in unity 7.
gsettings set com.canonical.Unity lowgfx true
and use this command to disable the low graphics mode
gsettings set com.canonical.Unity lowgfx false