On Tue, Jul 3, 2012 at 5:56 PM, Manolo Martínez <man...@austrohungaro.com> wrote: > None of that works: dwm keys are, as I say, unresponsive in fceux > fullscreen. When trying sleep + xprop, xprop complains that it can't > "grab the mouse". > Can you verify that the rectangle is in fact not a new top-level window but an in-window artifact of SDL by logging window mapping requests in your X11 server.
Something like the following Pseudo-C snippet, or preferably a gdb trace, should do the job. | case MapRequest: [..] | fprintf(stderr, "XID:\t%i", Req->Window); | break; The XID, if it's a top-level window, can than be input as an argument to xprop or xwininfo. > Sorry if I'm just being thick! > You're most likely not, this seems quite bizarre.
