diff --git a/src/add-ons/accelerants/nvidia/engine/nv_acc_dma.c b/src/add-ons/accelerants/nvidia/engine/nv_acc_dma.c
index 867a8f9744..4055420ec9 100644
--- a/src/add-ons/accelerants/nvidia/engine/nv_acc_dma.c
+++ b/src/add-ons/accelerants/nvidia/engine/nv_acc_dma.c
@@ -468,10 +468,6 @@ status_t nv_acc_init_dma()
 
 				ACCW(NV44_WHAT2, 0x00000000);
 				ACCW(NV44_WHAT3, 0x00000000);
-//schakelt screrm signaal uit op NV43, maar timing blijft werken<<<<<<<<
-//      	    pNv->PRAMDAC[0x0608/4] |= 0x00100000;//0x00680608==NVDAC_TSTCTRL haiku
-              									//b20=1=DACTM_TEST ON (termination?)
-              									//how about: NVDAC2_TSTCTRL????
 				break;
 			default:
 				ACCW(NV40P_WHAT0, 0x83280eff);
diff --git a/src/add-ons/accelerants/nvidia/engine/nv_dac2.c b/src/add-ons/accelerants/nvidia/engine/nv_dac2.c
index cd6f457df1..7e0f0e5a23 100644
--- a/src/add-ons/accelerants/nvidia/engine/nv_dac2.c
+++ b/src/add-ons/accelerants/nvidia/engine/nv_dac2.c
@@ -11,6 +11,7 @@ static status_t nv10_nv20_dac2_pix_pll_find(
 	display_mode target,float * calc_pclk,uint8 * m_result,uint8 * n_result,uint8 * p_result, uint8 test);
 
 /* see if an analog VGA monitor is connected to connector #2 */
+//fixme if possible: on NV40 arch (confirmed NV43) this routine always find a monitor!
 bool nv_dac2_crt_connected()
 {
 	uint32 output, dac;
diff --git a/src/add-ons/accelerants/nvidia/engine/nv_general.c b/src/add-ons/accelerants/nvidia/engine/nv_general.c
index edcd785501..1e6bc8c868 100644
--- a/src/add-ons/accelerants/nvidia/engine/nv_general.c
+++ b/src/add-ons/accelerants/nvidia/engine/nv_general.c
@@ -1251,6 +1251,10 @@ static status_t nv_general_bios_to_powergraphics()
 	/* turn on DAC and make sure detection testsignal routing is disabled
 	 * (b16 = disable DAC,
 	 *  b12 = enable testsignal output */
+	//fixme note: b20 ('DACTM_TEST') when set apparantly blocks a DAC's video output
+	//(confirmed NV43), while it's timing remains operational (black screen).
+	//It feels like in some screen configurations it can move the output to the other
+	//output connector as well...
 	DACW(TSTCTRL, (DACR(TSTCTRL) & 0xfffeefff));
 	/* turn on DAC2 if it exists
 	 * (NOTE: testsignal function block resides in DAC1 only (!)) */
diff --git a/src/add-ons/accelerants/nvidia/engine/nv_info.c b/src/add-ons/accelerants/nvidia/engine/nv_info.c
index 4c6ac9e821..51c8ca26b6 100644
--- a/src/add-ons/accelerants/nvidia/engine/nv_info.c
+++ b/src/add-ons/accelerants/nvidia/engine/nv_info.c
@@ -1,7 +1,7 @@
 /* Read initialisation information from card */
 /* some bits are hacks, where PINS is not known */
 /* Author:
-   Rudolf Cornelissen 7/2003-1/2005
+   Rudolf Cornelissen 7/2003-2/2005
 */
 
 #define MODULE_BIT 0x00002000
@@ -2493,6 +2493,24 @@ static void setup_output_matrix()
 				LOG(2,("INFO: head 2 has an analog panel or CRT:\n"));
 				LOG(2,("INFO: defaulting to head 1 for primary use.\n"));
 				break;
+			case 0x32: /* more than two monitors connected to just two outputs: illegal! */
+				//general fixme:
+				//NV40 architecture contains (an) additional switch(es) to
+				//connect a CRTC/DAC combination to a connector. We can't work as
+				//usual (yet) because this interferes via BIOS card pre-programming.
+				//
+				//Also: it looks as if each pixelclock PLL can select different CRTC's
+				//as well now via a new register: one PLL can be driving both CRTC's
+				//and there's nothing we can do about that (yet). (DVI/dualhead trouble)
+				if (si->ps.card_arch < NV40A)
+				{
+					LOG(2,("INFO: illegal monitor setup ($%02x):\n", si->ps.monitors));
+					/* head 2 takes precedence because it has a digital panel while
+					 * head 1 has not. */
+					LOG(2,("INFO: defaulting to head 2 for primary use.\n"));
+					si->ps.crtc2_prim = true;
+					break;
+				}
 			default: /* more than two monitors connected to just two outputs: illegal! */
 				LOG(2,("INFO: illegal monitor setup ($%02x):\n", si->ps.monitors));
 				LOG(2,("INFO: defaulting to head 1 for primary use.\n"));