https://bugs.freedesktop.org/show_bug.cgi?id=75128
Michel Dänzer michel@daenzer.net changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |NOTOURBUG
--- Comment #16 from Michel Dänzer michel@daenzer.net --- Looks like it's a Google Chrome window. Might be an issue in Google Chrome, or possibly in kwin (e.g. if you can't close it via right-click / Alt-F4 / ...). Presumably you should be able to get rid of it with xkill though.
Either way, it's not a driver issue.