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

[Eli Zaretskii]

> Date: Wed, 05 Nov 2014 04:28:53 -0200
> From: Bruno Félix Rezende Ribeiro <oitofelix@gnu.org>
> CC: 18912@debbugs.gnu.org
> 
> Eli Zaretskii wrote:
> > Then try this:
> > 
> >   (add-hook 'pre-command-hook 'force-mode-line-update)
> 
> It doesn't work. :-(

Told you so.

> In fact, even
> 
>   (add-hook 'pre-command-hook (lambda () (call-process "xrefresh")))
> 
> doesn't work completely.

I hope you are beginning to understand how non-trivial it is to
implement your workaround, even if we wanted to.