--- linux-2.6.6/sound/pci/au88x0/au88x0.h	2004-05-18 14:49:49.000000000 -0400
+++ linux-2.6.6_aureal/sound/pci/au88x0/au88x0.h	2004-06-03 10:48:11.000000000 -0400
@@ -94,7 +94,8 @@
 #define VORTEX_RESOURCE_LAST	0x00000005
 
 /* Check for SDAC bit in "Extended audio ID" AC97 register */
-#define VORTEX_IS_QUAD(x) ((x->codec == NULL) ?  0 : (x->codec->ext_id&0x80))
+//#define VORTEX_IS_QUAD(x) (((x)->codec == NULL) ?  0 : ((x)->codec->ext_id&0x80))
+#define VORTEX_IS_QUAD(x) ((x)->isquad)
 /* Check if chip has bug. */
 #define IS_BAD_CHIP(x) (\
 	(x->rev == 0xfe && x->device == PCI_DEVICE_ID_AUREAL_VORTEX2) || \
@@ -178,6 +179,8 @@
 	int xt_mode;		/* 1: speakers, 0:headphones. */
 #endif
 
+	int isquad;		/* cache of extended ID codec flag. */
+
 	/* Gameport stuff. */
 	struct gameport *gameport;
 
--- linux-2.6.6/sound/pci/au88x0/au88x0_mixer.c	2004-05-18 14:49:49.000000000 -0400
+++ linux-2.6.6_aureal/sound/pci/au88x0/au88x0_mixer.c	2004-06-03 10:46:45.000000000 -0400
@@ -25,5 +25,7 @@
 	memset(&ac97, 0, sizeof(ac97));
 	// Intialize AC97 codec stuff.
 	ac97.private_data = vortex;
-	return snd_ac97_mixer(pbus, &ac97, &vortex->codec);
+	err = snd_ac97_mixer(pbus, &ac97, &vortex->codec);
+	vortex->isquad = ((vortex->codec == NULL) ?  0 : (vortex->codec->ext_id&0x80));
+	return err;
 }