From b476e851b709445f8c0fb0eb7ce34454318cad6d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Fri, 19 Jan 2018 16:31:01 +0100
Subject: [PATCH] workspaceThumbnail: only update _porthole if the overview is
 visible

Otherwise it happens that porthole is computed again after that the
overlay is hidden (triggered by a layout reallocation) and thus not
regenerated again afterwards.

https://bugzilla.gnome.org/show_bug.cgi?id=792687


(cherry picked from commit 5fcf40b973286fd442148ee3348becd493c8206d)
---
 js/ui/workspaceThumbnail.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/ui/workspaceThumbnail.js b/js/ui/workspaceThumbnail.js
index 78fac80dd..c1b4bddc6 100644
--- a/js/ui/workspaceThumbnail.js
+++ b/js/ui/workspaceThumbnail.js
@@ -1168,7 +1168,7 @@ var ThumbnailsBox = new Lang.Class({
     // The "porthole" is the portion of the screen that we show in the
     // workspaces
     _ensurePorthole() {
-        if (!Main.layoutManager.primaryMonitor)
+        if (!Main.layoutManager.primaryMonitor || !Main.overview.visible)
             return false;
 
         if (!this._porthole)