Re: Does Emacs wm-window handling misbehave?

["Jan Djärv" <jan.h.d@swipnet.se>]

Mathias Dahl skrev:
> Lately I am having problems switching windows (window manager windows)
> using Alt+Tab. Like exactly right now when I type this in Emacs I try
> to switch window and it does not work. I can see the frame of other
> windows being marked/outlined and in the task bar the name of the
> window I am trying to switch to becomes bold. I have to use the mouse
> to switch instead, very annoying.
> 
> Until today I have thought this being a glitch in Metacity but by
> chance I stumbled upon the following messages in my .xsession-errors
> file today:
> 
>     Window manager warning: last_focus_time (5775062) is greater than
>     comparison timestamp (3763886959).  This most likely represents a
>     buggy client sending inaccurate timestamps in messages such as
>     _NET_ACTIVE_WINDOW.  Trying to work around...
> 
>     Window manager warning: last_user_time (5775062) is greater than
>     comparison timestamp (3763886959).  This most likely represents a
>     buggy client sending inaccurate timestamps in messages such as
>     _NET_ACTIVE_WINDOW.  Trying to work around...
> 
>     Window manager warning: 0x3c000a4 (.emacs) appears to be one of the
>     offending windows with a timestamp of 5775062.  Working around...
> 
> It suddenly occurred to me that I only experience the switching
> problem in Emacs and here is a reference to one of my Emacs
> windows. Could it be a coincidence or is Emacs doing anything bad? I
> don't want to report this as a bug just yet. Does anyone else have similar
> experiences? I cannot say when it happens, it suddenly does. When I have
> switched using the mouse it works again, for a while...
> 

Do you have click-to-focus?  This is strange, because Emacs only sends 
_NET_ACTIVE_WINDOW when x-focus-frame is called.
We did have an issue with timestamps, but that should have been fixed some 
time ago.  Can you explicitly call x-focus-frame and at the same time do a 
tail -f on .xsession-errors and see if the above message comes up?

	Jan D.