diff --git a/headers/private/graphics/radeon_hd/radeon_hd.h b/headers/private/graphics/radeon_hd/radeon_hd.h
index bd290b7a07..d860e28471 100644
--- a/headers/private/graphics/radeon_hd/radeon_hd.h
+++ b/headers/private/graphics/radeon_hd/radeon_hd.h
@@ -106,7 +106,7 @@ struct radeon_shared_info {
 	uint16			cursor_hot_x;
 	uint16			cursor_hot_y;
 
-	uint32			device_chipset;
+	uint16			device_chipset;
 	char			device_identifier[32];
 	struct pll_info	pll_info;
 };
diff --git a/src/add-ons/accelerants/radeon_hd/accelerant.cpp b/src/add-ons/accelerants/radeon_hd/accelerant.cpp
index 9489236be8..74b6267cfe 100644
--- a/src/add-ons/accelerants/radeon_hd/accelerant.cpp
+++ b/src/add-ons/accelerants/radeon_hd/accelerant.cpp
@@ -165,14 +165,8 @@ uninit_common(void)
 
 /*! Populate gRegister with device dependant register locations */
 static status_t
-init_registers()
+init_registers(uint16 chipset)
 {
-	// gInfo should always be populated before running this
-	if (gInfo == NULL)
-		return B_ERROR;
-
-	uint16_t chipset = gInfo->shared_info->device_chipset;
-
 	if (chipset >= RADEON_R800) {
 		gRegister->regOffsetCRT0 = EVERGREEN_CRTC0_REGISTER_OFFSET;
 		gRegister->regOffsetCRT1 = EVERGREEN_CRTC1_REGISTER_OFFSET;
@@ -233,15 +227,14 @@ radeon_init_accelerant(int device)
 	if (status != B_OK)
 		return status;
 
-	status = init_registers();
-	if (status != B_OK)
-		return status;
-
 	radeon_shared_info &info = *gInfo->shared_info;
 
 	init_lock(&info.accelerant_lock, "radeon hd accelerant");
 	init_lock(&info.engine_lock, "radeon hd engine");
 
+	status = init_registers(info.device_chipset);
+	if (status != B_OK)
+		return status;
 
 	status = create_mode_list();
 	if (status != B_OK) {
diff --git a/src/add-ons/accelerants/radeon_hd/mode.cpp b/src/add-ons/accelerants/radeon_hd/mode.cpp
index 53bb52be1e..7cb6860a45 100644
--- a/src/add-ons/accelerants/radeon_hd/mode.cpp
+++ b/src/add-ons/accelerants/radeon_hd/mode.cpp
@@ -136,7 +136,7 @@ CardBlankSet(int crtNumber, bool blank)
 	int blackColorReg;
 	int blankControlReg;
 
-	if (crtNumber == 2) {
+	if (crtNumber == 1) {
 		blackColorReg = D2CRTC_BLACK_COLOR;
 		blankControlReg = D2CRTC_BLANK_CONTROL;
 	} else {
@@ -287,7 +287,6 @@ CardModeScale(int crtNumber, display_mode *mode)
 	uint16_t regOffset = (crtNumber == 0)
 		? gRegister->regOffsetCRT0 : gRegister->regOffsetCRT1;
 
-	/* D1Mode registers */
 	write32(regOffset + gRegister->viewportSize,
 		mode->timing.v_display | (mode->timing.h_display << 16));
 	write32(regOffset + gRegister->viewportStart, 0);
@@ -300,6 +299,19 @@ CardModeScale(int crtNumber, display_mode *mode)
 	write32(regOffset + D1SCL_ENABLE, 0);
 	write32(regOffset + D1SCL_TAP_CONTROL, 0);
 	write32(regOffset + D1MODE_CENTER, 2);
+
+	write32(regOffset + D1SCL_UPDATE, 0);
+	write32(regOffset + D1SCL_FLIP_CONTROL, 0);
+
+	write32(regOffset + D1SCL_ENABLE, 1);
+	write32(regOffset + D1SCL_HVSCALE, 0x00010001);
+
+	write32(regOffset + D1SCL_TAP_CONTROL, 0x00000101);
+
+	write32(regOffset + D1SCL_HFILTER, 0x00030100);
+	write32(regOffset + D1SCL_VFILTER, 0x00030100);
+
+	write32(regOffset + D1SCL_DITHER, 0x00001010);
 }
 
 
diff --git a/src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp b/src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp
index ddfec97aee..ba6d253c37 100644
--- a/src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp
+++ b/src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp
@@ -38,7 +38,7 @@
 // list of supported devices
 const struct supported_device {
 	uint32		device_id;
-	int32		chipset;
+	uint16		chipset;
 	const char*	name;
 } kSupportedDevices[] = {
 	// R600 series	(HD24xx - HD42xx)
diff --git a/src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp b/src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp
index 5e1cdbd3a8..df17dd16d7 100644
--- a/src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp
+++ b/src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp
@@ -113,21 +113,23 @@ radeon_hd_init(radeon_info &info)
 	if (info.shared_info->device_chipset >= RADEON_R800) {
 		// R800+ has memory stored in MB
 		info.shared_info->graphics_memory_size
-			= read32(info.registers + R6XX_CONFIG_MEMSIZE) << 10;
+			= read32(info.registers + R6XX_CONFIG_MEMSIZE) / 1024;
 		info.shared_info->graphics_aperture_size
-			= read32(info.registers + R6XX_CONFIG_APER_SIZE) << 10;
+			= read32(info.registers + R6XX_CONFIG_APER_SIZE) / 1024;
 	} else {
 		// R600-R700 has memory stored in bytes
 		info.shared_info->graphics_memory_size
-			= read32(info.registers + R6XX_CONFIG_MEMSIZE) >> 10;
+			= read32(info.registers + R6XX_CONFIG_MEMSIZE) * 1024;
 		info.shared_info->graphics_aperture_size
-			= read32(info.registers + R6XX_CONFIG_APER_SIZE) >> 10;
+			= read32(info.registers + R6XX_CONFIG_APER_SIZE) * 1024;
 	}
 
+	int32 memory_size = info.shared_info->graphics_memory_size * 1024;
+	int32 aperture_size = info.shared_info->graphics_aperture_size * 1024;
 	TRACE("card(%ld): found %ld MB memory on card.\n", info.id,
-		info.shared_info->graphics_memory_size >> 10);
+		memory_size);
 	TRACE("card(%ld): found %ld MB aperture on card.\n", info.id,
-		info.shared_info->graphics_aperture_size >> 10);
+		aperture_size);
 
 	// if there are more then 512MB memory on the card, only map
 	// the aperture size to prevent overflow of gart