Index: /trunk/src/VBox/Devices/Audio/DevIchIntelHDA.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/DevIchIntelHDA.cpp	(revision 31032)
+++ /trunk/src/VBox/Devices/Audio/DevIchIntelHDA.cpp	(revision 31033)
@@ -77,4 +77,7 @@
 #define ICH6_HDA_GCTL_FSH_SHIFT (1)
 #define GCTL(pState) (HDA_REG((pState), GCTL))
+
+#define ICH6_HDA_REG_WAKEEN 6 /* 0x0C */
+#define WAKEEN(pState) (HDA_REG((pState), WAKEEN))
 
 #define ICH6_HDA_REG_STATES 7 /* range 0x0E */
@@ -452,5 +455,5 @@
     { 0x00006, 0x00002, 0x0000FFFF, 0x00000000, hdaRegReadU16          , hdaRegWriteUnimplemented, "INPAY"     , "Input Payload Capabilities" },
     { 0x00008, 0x00004, 0x00000103, 0x00000103, hdaRegReadGCTL         , hdaRegWriteGCTL         , "GCTL"      , "Global Control" },
-    { 0x0000c, 0x00002, 0xFFFFFFFF, 0x00000000, hdaRegReadUnimplemented, hdaRegWriteUnimplemented, "WAKEEN"    , "Wake Enable" },
+    { 0x0000c, 0x00002, 0x00007FFF, 0x00007FFF, hdaRegReadU16          , hdaRegWriteU16          , "WAKEEN"    , "Wake Enable" },
     { 0x0000e, 0x00002, 0x00000007, 0x00000007, hdaRegReadU8           , hdaRegWriteSTATESTS     , "STATESTS"  , "State Change Status" },
     { 0x00010, 0x00002, 0xFFFFFFFF, 0x00000000, hdaRegReadUnimplemented, hdaRegWriteUnimplemented, "GSTS"      , "Global Status" },
@@ -1351,5 +1354,4 @@
     pThis->hda.au32Regs[ICH6_HDA_REG_CORBSIZE] = 0x42; /* see 6.2.1 */
     pThis->hda.au32Regs[ICH6_HDA_REG_RIRBSIZE] = 0x42; /* see 6.2.1 */
-    STATES(&pThis->hda) = 0x1;
     CORBRP(&pThis->hda) = 0x0;
     RIRBWP(&pThis->hda) = 0x0;
@@ -1509,4 +1511,10 @@
     hdaReset (pDevIns);
     pThis->hda.Codec.pfnTransfer = hdaTransfer;
+    /* 
+     * 18.2.6,7 defines that values of this registers might be cleared on power on/reset
+     * hdaReset shouldn't affects these registers.
+     */
+    WAKEEN(&pThis->hda) = 0x1;
+    STATES(&pThis->hda) = 0x1;
 
     return VINF_SUCCESS;