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List:       kwin
Subject:    Re: _NET_ACTIVE_WINDOW sent on workplace switch
From:       Lubos Lunak <l.lunak () suse ! cz>
Date:       2007-06-10 12:03:07
Message-ID: 200706101403.07954.l.lunak () suse ! cz
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On so 9. června 2007, Thomas Thurman wrote:
> Hi. I'm one of the maintainers of the GNOME window manager, and someone has
> raised a bug which boils down to the fact that KDE applications are sending
> _NET_ACTIVE_WINDOW on themselves to the root window when the user switches
> workplaces to the workplace on which they reside. I have confirmed that
> this happens with KCalc (2.0.6, KDE 3.5.6, Qt 3.3.7), and not with
> gnome-calculator. I'm prepared to start digging through KDE and Qt to find
> the problem, but before I start, is there a known reason they would be
> sending this message?

 No, they shouldn't, and as far as I can tell, they don't. I added debug 
statements to the place in KDE libraries for sending this message and it's 
not called when the problem occurs (and Qt does not use _NET_ACTIVE_WINDOW at 
all).

 Also, I can reproduce the problem even in KDE, but only with Metacity running 
instead of KWin, which narrows it down to the offender being either Metacity 
or KCalc (+libs). Since the request doesn't seem to come from KCalc and KWin 
should have the same problem if it did, I think the problem is in Metacity. I 
suggest you try to find out where the activation request really comes from.

> The bug is http://bugzilla.gnome.org/show_bug.cgi?id=445835 -- the reason
> for the title is that metacity sets _NET_WM_STATE_DEMANDS_ATTENTION for at
> least partially obscured windows which attempt to activate themselves (and
> ignores the request).
>
> (Of course, this is not a kwin problem, but the people on #kde-devel said
> to come and ask here because you would be most likely to know.)

 Yes, that's ok.

-- 
Lubos Lunak
KDE developer
--------------------------------------------------------------
SUSE LINUX, s.r.o.   e-mail: l.lunak@suse.cz , l.lunak@kde.org
Lihovarska 1060/12   tel: +420 284 028 972
190 00 Prague 9      fax: +420 284 028 951
Czech Republic       http//www.suse.cz
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