Make sure to read this first
https://github.com/SFML/SFML/issues/7
Sorry, I didn't seen it
Also I found another SFML bugs. Could you please look it?
1) It seems that Fullscreen mode on linux has a lot of bugs, something is going wrong with system after switch to fullscreen mode. App still works, but when I trying to shutdown the system it hung. Also see my finding #2
2) Fullscreen mode window doesn't handle resize event properly on Windows XP and Linux. Some artefacts appears at the bottom of the screen and it still exists after switch back to window mode.
Also Window.Size sometimes reports invalid size in fullscreen mode (it's bigger that display size). I'm not sure but it may be result of some hidden bug which corrupt memory or something like that.
On Windows 7 and Windows 10 fullscreen works OK.
3) On Windows XP app close causes crash with Access violation on read protected memory