From c12875ccd34a3c15c988f0e261633b0d94c8c5a1 Mon Sep 17 00:00:00 2001
From: "Carsten Haitzler (Rasterman)" <raster@rasterman.com>
Date: Thu, 7 Aug 2014 14:27:07 +0900
Subject: [PATCH] ecore vsync - add getenv env var to disable vsync attempt

this is a quick try to allow testing and fixing of the vbox vsync
kernel panic with ability to turn it off so debugging can be done
---
 src/lib/ecore_x/xlib/ecore_x_vsync.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/lib/ecore_x/xlib/ecore_x_vsync.c b/src/lib/ecore_x/xlib/ecore_x_vsync.c
index a842f3071c..e8f2824f31 100644
--- a/src/lib/ecore_x/xlib/ecore_x_vsync.c
+++ b/src/lib/ecore_x/xlib/ecore_x_vsync.c
@@ -562,6 +562,14 @@ EAPI Eina_Bool
 ecore_x_vsync_animator_tick_source_set(Ecore_X_Window win)
 {
    Ecore_X_Window root;
+   static int vsync_veto = -1;
+
+   if (vsync_veto == -1)
+     {
+        if (getenv("ECORE_NO_VSYNC")) vsync_veto = 1;
+        else vsync_veto = 0;
+     }
+   if (vsync_veto == 1) return EINA_FALSE;
 
    root = ecore_x_window_root_get(win);
    if (root != vsync_root)