In case you have old graphics hardware or any other low performance issues with Unity 3D, just try this and it might change your desktop responsiveness for the better. Especially those of you who were used to Unity 2D , you find this quite similar (in terms of desktop performance). Make no mistake here, this option is NOT Unity 2D, but just a hack to trigger no OpenGL support using LLVMpipe. So, in order to enable the low graphics mode you have to activate the LOW_GFX mode in X11 llvm parameter.
Personally I didn’t see any difference, but a friend of mine using an old notebook he claims there is. So, give it a try and if you don’t see any difference undo the setting.
There are 2 ways to do this:
There is an environment variable you can set,
should replace your existing session with the “low graphics mode” desktop.
If for some reason you want to make it permanent
- For your user:Add the line
to the file
~/.xprofile(create one, if it doesn’t exist).
- Or globally:Create a file
/etc/X11/Xsession.d/99force-llvmand add above line (requires root permissions, see this answer about how to create a file as root).