From cc967849f7653c697c33571a1a6a55e9ffd966ff Mon Sep 17 00:00:00 2001

From: Pavel Roskin <plroskin@gmail.com>

Date: Thu, 8 Mar 2018 15:58:42 +0100

Subject: [PATCH] x11: Avoid a division by zero

This is similar to f44baf51d9e8616a but for RandR 1.3 servers like

x11rdp and Windows Exceed which don't return a refresh rate. Avoid a

crash when that happens.

https://bugzilla.gnome.org/show_bug.cgi?id=775546

---

 gdk/x11/gdkscreen-x11.c | 3 ++-

 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gdk/x11/gdkscreen-x11.c b/gdk/x11/gdkscreen-x11.c

index 20fd27531e45..272cecd7aa4b 100644

--- a/gdk/x11/gdkscreen-x11.c

+++ b/gdk/x11/gdkscreen-x11.c

@@ -658,7 +658,8 @@ init_randr13 (GdkScreen *screen, gboolean *changed)

               XRRModeInfo *xmode = &resources->modes[j];

               if (xmode->id == crtc->mode)

                 {

-                  refresh_rate = (1000 * xmode->dotClock) / (xmode->hTotal *xmode->vTotal);

+                  if (xmode->hTotal != 0 && xmode->vTotal != 0)

+                    refresh_rate = (1000 * xmode->dotClock) / (xmode->hTotal * xmode->vTotal);

                   break;

                 }

             }

-- 

2.14.3