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[Bug 400374] Re: X server freezes while the application is executing XQueryPointer

To: ubuntu-x-swat@xxxxxxxxxxxxxxxxxxx
From: Dima Ryazanov <dima@xxxxxxxxx>
Date: Wed, 23 Sep 2009 04:39:16 -0000
Reply-to: Bug 400374 <400374@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Oh interesting. _gdk_windowing_window_at_pointer calls XQueryPointer
multiple times, and has the following explanation for the grab:

  /* This function really only works if the mouse pointer is held still
   * during its operation. If it moves from one leaf window to another
   * than we'll end up with inaccurate values for win_x, win_y
   * and the result.
   */

So who's at fault here? Gdk, for grabbing the server? Or Xlib, for not
providing better APIs?

It's not possible to attach a second gdb instance to ungrab the server.
Killing the program works, of course, but this isn't exactly a solution.

-- 
X server freezes while the application is executing XQueryPointer
https://bugs.launchpad.net/bugs/400374
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