diff --git a/shared-core/nouveau_drv.h b/shared-core/nouveau_drv.h
index 007bdd6a..94b46efd 100644
--- a/shared-core/nouveau_drv.h
+++ b/shared-core/nouveau_drv.h
@@ -112,8 +112,6 @@ typedef struct drm_nouveau_private {
 	drm_local_map_t *mmio;
 	drm_local_map_t *fb;
 
-	int64_t fb_usable_size;
-
 	int      cur_fifo;
 
 	struct nouveau_object *fb_obj;
diff --git a/shared-core/nouveau_fifo.c b/shared-core/nouveau_fifo.c
index da9a8630..1761bbec 100644
--- a/shared-core/nouveau_fifo.c
+++ b/shared-core/nouveau_fifo.c
@@ -227,7 +227,7 @@ static int nouveau_fifo_alloc(drm_device_t* dev,drm_nouveau_fifo_alloc_t* init,
 	/* disable the fifo caches */
 	NV_WRITE(NV_PFIFO_CACHES, 0x00000000);
 
-	if (dev_priv->card_type <= NV_04)
+	if (dev_priv->card_type <= NV_05)
 		ctx_size=32;
 	else
 		ctx_size=128;
@@ -239,7 +239,7 @@ static int nouveau_fifo_alloc(drm_device_t* dev,drm_nouveau_fifo_alloc_t* init,
 
 	NV_WRITE(ctx_addr,init->put_base);
 	NV_WRITE(ctx_addr+4,init->put_base);
-	if (dev_priv->card_type <= NV_04)
+	if (dev_priv->card_type <= NV_05)
 	{
 		// that's what is done in nvosdk, but that part of the code is buggy so...
 		NV_WRITE(ctx_addr+8,dev_priv->cmdbuf_obj->instance >> 4);
diff --git a/shared-core/nouveau_irq.c b/shared-core/nouveau_irq.c
index 39b33ea6..4e58540d 100644
--- a/shared-core/nouveau_irq.c
+++ b/shared-core/nouveau_irq.c
@@ -69,7 +69,15 @@ void nouveau_irq_postinstall(drm_device_t *dev)
 	DRM_DEBUG("IRQ: postinst\n");
 
 	/* Enable PFIFO error reporting */
-	NV_WRITE(NV_PFIFO_INTEN , NV_PFIFO_INTR_ERROR);
+	NV_WRITE(NV_PFIFO_INTEN , 
+			NV_PFIFO_INTR_CACHE_ERROR |
+			NV_PFIFO_INTR_RUNOUT |
+			NV_PFIFO_INTR_RUNOUT_OVERFLOW |
+			NV_PFIFO_INTR_DMA_PUSHER |
+			NV_PFIFO_INTR_DMA_PT |
+			NV_PFIFO_INTR_SEMAPHORE |
+			NV_PFIFO_INTR_ACQUIRE_TIMEOUT
+			);
 	NV_WRITE(NV_PFIFO_INTSTAT, 0xFFFFFFFF);
 
 	/* Enable PGRAPH interrupts */
@@ -279,6 +287,7 @@ static void nouveau_pgraph_irq_handler(drm_device_t *dev)
 		switch(dev_priv->card_type)
 		{
 			case NV_04:
+			case NV_05:
 				nouveau_nv04_context_switch(dev);
 				break;
 			case NV_10:
diff --git a/shared-core/nouveau_reg.h b/shared-core/nouveau_reg.h
index 2b723c76..ac7c932b 100644
--- a/shared-core/nouveau_reg.h
+++ b/shared-core/nouveau_reg.h
@@ -75,7 +75,13 @@
 #define NV_PFIFO_DMA_TIMESLICE                             0x00002044
 #define NV_PFIFO_INTSTAT                                   0x00002100
 #define NV_PFIFO_INTEN                                     0x00002140
-#    define NV_PFIFO_INTR_ERROR                                (1<<0)
+#    define NV_PFIFO_INTR_CACHE_ERROR                         (1<< 0)
+#    define NV_PFIFO_INTR_RUNOUT                              (1<< 4)
+#    define NV_PFIFO_INTR_RUNOUT_OVERFLOW                     (1<< 8)
+#    define NV_PFIFO_INTR_DMA_PUSHER                          (1<<12)
+#    define NV_PFIFO_INTR_DMA_PT                              (1<<16)
+#    define NV_PFIFO_INTR_SEMAPHORE                           (1<<20)
+#    define NV_PFIFO_INTR_ACQUIRE_TIMEOUT                     (1<<24)
 #define NV_PFIFO_RAMHT                                     0x00002210
 #define NV_PFIFO_RAMFC                                     0x00002214
 #define NV_PFIFO_RAMRO                                     0x00002218
@@ -91,7 +97,6 @@
 #define NV_PFIFO_CACH1_DMAPSH                              0x00003220
 #define NV_PFIFO_CACH1_DMAF                                0x00003224
 #    define NV_PFIFO_CACH1_DMAF_TRIG_8_BYTES               0x00000000
-#    define NV_PFIFO_CACH1_DMAF_TRIG_8_BYTES               0x00000000
 #    define NV_PFIFO_CACH1_DMAF_TRIG_16_BYTES              0x00000008
 #    define NV_PFIFO_CACH1_DMAF_TRIG_24_BYTES              0x00000010
 #    define NV_PFIFO_CACH1_DMAF_TRIG_32_BYTES              0x00000018
diff --git a/shared-core/nouveau_state.c b/shared-core/nouveau_state.c
index a015a0fe..bd70aef9 100644
--- a/shared-core/nouveau_state.c
+++ b/shared-core/nouveau_state.c
@@ -64,11 +64,6 @@ int nouveau_firstopen(struct drm_device *dev)
 
 	DRM_INFO("%lld MB of video ram detected\n",nouveau_mem_fb_amount(dev)>>20);
 
-	if (dev_priv->card_type>=NV_40)
-		dev_priv->fb_usable_size=nouveau_mem_fb_amount(dev)-560*1024;
-	else
-		dev_priv->fb_usable_size=nouveau_mem_fb_amount(dev)-256*1024;
-
 	return 0;
 }