bug#18912: 24.4; mode-line corruption on graphical frames in dual-headed display

[Eli Zaretskii]

> Date: Tue, 04 Nov 2014 20:24:27 +0100
> From: martin rudalics <rudalics@gmx.at>
> CC: 18912@debbugs.gnu.org
> 
>  > Moreover, the fact that running xrefresh, which is not an Emacs
>  > command, fixes the display is yet another argument against this
>  > hypothesis.  xrefresh doesn't communicate with Emacs, so the only way
>  > it could fix the display is if the data supplied by Emacs was correct.
> 
> But the data supplied by us is still the same?

Of course.  There's no communications between Emacs and X when
xrefresh runs, AFAIK.