* gtkutil.c (x_wm_set_size_hint): Don't set hints when maximized

or fullscreen.

Fixes: debbugs:14627

1 files changed, 11 insertions, 0 deletions

diff --git a/src/gtkutil.c b/src/gtkutil.c
index 7e304d417d..8e255ac4bf 100644
--- a/src/gtkutil.c
+++ b/src/gtkutil.c
@@ -1341,6 +1341,7 @@ x_wm_set_size_hint (struct frame *f, long int flags, bool user_position)
   int base_width, base_height;
   int min_rows = 0, min_cols = 0;
   int win_gravity = f->win_gravity;
+  Lisp_Object fs_state, frame;
 
   /* Don't set size hints during initialization; that apparently leads
      to a race condition.  See the thread at
@@ -1348,6 +1349,16 @@ x_wm_set_size_hint (struct frame *f, long int flags, bool user_position)
   if (NILP (Vafter_init_time) || !FRAME_GTK_OUTER_WIDGET (f))
     return;
 
+  XSETFRAME (frame, f);
+  fs_state = Fframe_parameter (frame, Qfullscreen);
+  if (EQ (fs_state, Qmaximized) || EQ (fs_state, Qfullboth))
+    {
+      /* Don't set hints when maximized or fullscreen.  Apparently KWin and
+         Gtk3 don't get along and the frame shrinks (!).
+      */
+      return;
+    }
+
   if (flags)
     {
       memset (&size_hints, 0, sizeof (size_hints));