diff --git a/.hgtags b/.hgtags
index d440a39e8e16ae37baab003fdcc118ad5a5eebff..c5d9c8f7f5805f49d6324431474fbb329d24f0e5 100755
--- a/.hgtags
+++ b/.hgtags
@@ -549,3 +549,4 @@ a3143db58a0f6b005232bf9018e7fef17ff9ec90 6.1.0-release
 82a89165e5929a6c3073d6cd60a543cb395f147b 6.2.0-release
 706bdc7e25c6e6b8fb56f4a13fcce2936e70a79c 6.2.1-release
 ec09daf1899c1c01c4ba0ba950fae572f2a612a8 6.2.2-release
+ab2ec5c5423b277d23fd0511ce50c15123ff2e03 6.2.3-release
diff --git a/doc/contributions.txt b/doc/contributions.txt
index a73bd10295bdbb8989189a2fe63b7c213cf3c747..466dffded7214dd9769bd9fb58d6793cfdd8e7cf 100755
--- a/doc/contributions.txt
+++ b/doc/contributions.txt
@@ -1323,6 +1323,7 @@ Sovereign Engineer
     STORM-2143
     STORM-2148
     MAINT-7343
+    SL-11079
 SpacedOut Frye
 	VWR-34
 	VWR-45
diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp
index 504c1589b0c8c641a2acbc807ab58a41f1ddb1eb..97cd31de81a32e8b83000a0e7ca222cdc081234b 100644
--- a/indra/llwindow/llwindowwin32.cpp
+++ b/indra/llwindow/llwindowwin32.cpp
@@ -425,6 +425,9 @@ LLWindowWin32::LLWindowWin32(LLWindowCallbacks* callbacks,
 	mKeyVirtualKey = 0;
 	mhDC = NULL;
 	mhRC = NULL;
+	memset(mCurrentGammaRamp, 0, sizeof(mCurrentGammaRamp));
+	memset(mPrevGammaRamp, 0, sizeof(mPrevGammaRamp));
+	mCustomGammaSet = FALSE;
 	
 	if (!SystemParametersInfo(SPI_GETMOUSEVANISH, 0, &mMouseVanish, 0))
 	{
@@ -2989,13 +2992,34 @@ F32 LLWindowWin32::getGamma()
 
 BOOL LLWindowWin32::restoreGamma()
 {
-	return SetDeviceGammaRamp(mhDC, mPrevGammaRamp);
+	if (mCustomGammaSet != FALSE)
+	{
+        LL_DEBUGS("Window") << "Restoring gamma" << LL_ENDL;
+		mCustomGammaSet = FALSE;
+		return SetDeviceGammaRamp(mhDC, mPrevGammaRamp);
+	}
+	return TRUE;
 }
 
 BOOL LLWindowWin32::setGamma(const F32 gamma)
 {
 	mCurrentGamma = gamma;
 
+	//Get the previous gamma ramp to restore later.
+	if (mCustomGammaSet == FALSE)
+	{
+        if (!gGLManager.mIsIntel) // skip for Intel GPUs (see SL-11341)
+        {
+            LL_DEBUGS("Window") << "Getting the previous gamma ramp to restore later" << LL_ENDL;
+            if(GetDeviceGammaRamp(mhDC, mPrevGammaRamp) == FALSE)
+            {
+                LL_WARNS("Window") << "Failed to get the previous gamma ramp" << LL_ENDL;
+                return FALSE;
+            }
+        }
+		mCustomGammaSet = TRUE;
+	}
+
 	LL_DEBUGS("Window") << "Setting gamma to " << gamma << LL_ENDL;
 
 	for ( int i = 0; i < 256; ++i )
@@ -3007,9 +3031,9 @@ BOOL LLWindowWin32::setGamma(const F32 gamma)
 		if ( value > 0xffff )
 			value = 0xffff;
 
-		mCurrentGammaRamp [ 0 * 256 + i ] = 
-			mCurrentGammaRamp [ 1 * 256 + i ] = 
-				mCurrentGammaRamp [ 2 * 256 + i ] = ( WORD )value;
+		mCurrentGammaRamp[0][i] =
+			mCurrentGammaRamp[1][i] =
+			mCurrentGammaRamp[2][i] = (WORD) value;
 	};
 
 	return SetDeviceGammaRamp ( mhDC, mCurrentGammaRamp );
diff --git a/indra/llwindow/llwindowwin32.h b/indra/llwindow/llwindowwin32.h
index d72623a6f40602bcb466ed87a9bcc196d0a2240e..9cd16eb99373b3079b33c225a2db80a593cceec7 100644
--- a/indra/llwindow/llwindowwin32.h
+++ b/indra/llwindow/llwindowwin32.h
@@ -184,8 +184,9 @@ class LLWindowWin32 : public LLWindow
 
 	F32			mCurrentGamma;
 	U32			mFSAASamples;
-	WORD		mPrevGammaRamp[256*3];
-	WORD		mCurrentGammaRamp[256*3];
+	WORD		mPrevGammaRamp[3][256];
+	WORD		mCurrentGammaRamp[3][256];
+	BOOL		mCustomGammaSet;
 
 	LPWSTR		mIconResource;
 	BOOL		mMousePositionModified;