Yes there could be. Upon further testing: After restarting the problem doesn't occur again. After 2h of uptime the issue comes back but slightly less lag. Copying was not laggy, but after attempting to close the window the screen froze for 2 seconds, and any operation after that was laggy again( as in frame drops and stutter). The lag disappeared as soon as the copying completed.

2017-02-10 16:58 GMT+02:00 Fred Smith <>:
On Fri, Feb 10, 2017 at 12:40:00PM -0000, Bill Kontos wrote:
> I am encountering a bug that causes extreme UI and mouse lag when copying files using Nautilus on a fedora 25 installation. The system is up to date as of 9/2/2017. This is encountered both when I'm copying from a directory on the internal hard drive to another directory or from a directory from the internal hard drive to a removable media. Mouse, switching windows pressing super, everything lags. The lag stops when the copy operation is completed or if I cancel it.
> Is this a known bug with a workaround or should I report it ? If I should report it can you point me where and how ?

probably not immediately helpful: could be "buffer bloat" somewhere
along the way?

---- Fred Smith -- -----------------------------
                      The eyes of the Lord are everywhere,
                    keeping watch on the wicked and the good.
----------------------------- Proverbs 15:3 (niv) -----------------------------
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