From f7795e0c2faeea1d34f86ae03c2fcefd2209f522 Mon Sep 17 00:00:00 2001
From: Jason Sams <rjsams@android.com>
Date: Fri, 17 Feb 2012 16:59:50 -0800
Subject: [PATCH] Work around VSync signal while screen is off.

Change-Id: I0a9637170ee658ff84a363e91c558892dce5cfaf
---
 libs/rs/rsContext.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libs/rs/rsContext.cpp b/libs/rs/rsContext.cpp
index adaefc6017bf3..95ac76e84fd93 100644
--- a/libs/rs/rsContext.cpp
+++ b/libs/rs/rsContext.cpp
@@ -263,6 +263,10 @@ void * Context::threadProc(void *vrsc) {
             rsc->timerSet(RS_TIMER_IDLE);
 
 #ifndef ANDROID_RS_SERIALIZE
+            if (!rsc->mRootScript.get() || !rsc->mHasSurface || rsc->mPaused) {
+                targetRate = 0;
+            }
+
             if (vsyncRate != targetRate) {
                 displayEvent.setVsyncRate(targetRate);
                 vsyncRate = targetRate;