I am not sure which version of vim you are on. I have been using clibpoard paste for a long time in Ubunut. Do a ":version" in vim and check if it's compiled with +clipboard. If it is, then it should work.

Also, you can have this in your vimrc:

  set clipboard=unnamedplus

And then your vim copy-paste will be in sync with system clipboard(no need for +p or +y).