Comment 29 for bug 1208993

I'm having this issue right now on 16.04. What's strange, is that if I copy say 600GB worth of thousands of files, about half way through, Xorg will start chewing up resources, and everything slows down to a hault, even though literally the only thing I ever opened was Nautilus. I never opened Firefox, or anything elses. Straight boot to the file manager to copy files. It's a weird issue to say the least, because I can't determine why Xorg would be freaking out on large file copying. If the files finish, the performance is still poor until I reboot the machine.