I met not empty trash problem in Ubuntu 14.04. I right the Recycle Bin icon and select Empty Recycle Bin, as I have always done. I see a progress bar delete files after a while. But it stopped, and the Nautilus file manager also stopped. I had to stop it in the terminal.
But this is very painful because the file is still in the trash. And I repeated attempts emptied windows are frozen.
I honestly do not know what's causing the problem. But I have a solution if you are in Ubuntu 14.04 or 14.10 encountered this problem, then.
Open a terminal and use the following command:
sudo rm -rf ~ / .local / share / Trash / *
Note here that your input. You use the super administrator privileges to run the delete command. I'm sure you do not delete other files or directories.
The above command will delete all the files in the recycle bin directory. In other words, this is the Empty Trash command. After you are finished using the above command, you will see the trash has been emptied. If you emptied all the files, you should not see the Nautilus crash problem.
I hope this tips useful to you, in the future you will not encounter the same problems in Ubuntu or other distributions. If you encounter any problems, please let me know.