From ae382949c834ea7982bf99defc5599a6dd09408c Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Tue, 15 May 2018 09:54:24 +1000
Subject: [PATCH] [opengl] glxWaitVideoSyncSGI is not well supported in Mesa 18

It seems Mesa 18 has problems with the glxWaitVideoSyncSGI API so
we disable the 'preventBuffer' option by default
---
 client/renderers/opengl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/client/renderers/opengl.c b/client/renderers/opengl.c
index 6fab7572..792c540f 100644
--- a/client/renderers/opengl.c
+++ b/client/renderers/opengl.c
@@ -54,7 +54,7 @@ static struct Options defaultOptions =
 {
   .mipmap        = true,
   .vsync         = true,
-  .preventBuffer = true,
+  .preventBuffer = false,
 };
 
 struct Inst
@@ -485,7 +485,7 @@ static LG_RendererOpt opengl_options[] =
   },
   {
     .name      = "preventBuffer",
-    .desc      = "Prevent the driver from buffering frames [default: enabled]",
+    .desc      = "Prevent the driver from buffering frames [default: disabled]",
     .validator = LG_RendererValidatorBool,
     .handler   = handle_opt_prevent_buffer
   }