STR #3396

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STR #3396

Application:FLTK Library
Status:5 - New
Priority:2 - Low, e.g. a documentation error or undocumented side-effect
Scope:2 - Specific to an operating system
Summary:Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0
Created By:chris
Assigned To:Unassigned
Fix Version:Unassigned
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Name/Time/Date Text top right image
#1 chris
07:39 Aug 15, 2017
With Ubuntu 17.04/Metacity there are warning messages written to console, like:

Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x4a00003 (win1)
Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed.

Noticed with the test programs 'twowin' (when clicking on buttons b1/b2) and 'windowfocus' (when entering text).

These come from Fl_x.cxx line 2228, where 0 is used as timestamp.
I tried using fl_event_time instead, which seems to work.
#2 chris
05:51 Feb 06, 2018
Can still be observed with Ubuntu 17.10 when running with Gnome-Session-Flashback/Metacity (XDG_SESSION_DESKTOP="gnome-flashback-metacity").

It occurs only, when Metacity is configured to run non-compositing (this can be achieved with: metacity --replace --no-composite &).

Here is change mentioned in #1 in diff format:

Index: src/Fl_x.cxx
--- src/Fl_x.cxx (Revision 12646)
+++ src/Fl_x.cxx (Arbeitskopie)
@@ -2226,7 +2226,7 @@
   send_wm_event(w, fl_NET_ACTIVE_WINDOW, 1 /* application */,
-                0 /* timestamp */, prev /* previously active window */);
+                fl_event_time /* timestamp */, prev /* previously active window */);
 /* Change an existing window to fullscreen */
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