diff -rNu linux/drivers/video/aty/atyfb_base.c linux-custom/drivers/video/aty/atyfb_base.c
--- linux/drivers/video/aty/atyfb_base.c	2002-08-03 02:39:45.000000000 +0200
+++ linux-custom/drivers/video/aty/atyfb_base.c	2002-09-05 15:13:11.000000000 +0200
@@ -359,7 +359,7 @@
     { 0x4c50, 0x4c50, 0x00, 0x00, m64n_ltp_p,   230, 100, M64F_GT | M64F_INTEGRATED | M64F_RESET_3D | M64F_GTB_DSP },
 
     /* 3D RAGE Mobility */
-    { 0x4c4d, 0x4c4d, 0x00, 0x00, m64n_mob_p,   230,  50, M64F_GT | M64F_INTEGRATED | M64F_RESET_3D | M64F_GTB_DSP | M64F_MOBIL_BUS },
+    { 0x4c4d, 0x4c4d, 0x00, 0x00, m64n_mob_p,   235,  63, M64F_GT | M64F_INTEGRATED | M64F_RESET_3D | M64F_GTB_DSP | M64F_MOBIL_BUS | M64F_XL_DLL },
     { 0x4c4e, 0x4c4e, 0x00, 0x00, m64n_mob_a,   230,  50, M64F_GT | M64F_INTEGRATED | M64F_RESET_3D | M64F_GTB_DSP | M64F_MOBIL_BUS },
 #endif /* CONFIG_FB_ATY_CT */
 };
@@ -754,7 +754,10 @@
     aty_set_crtc(info, &par->crtc);
     aty_st_8(CLOCK_CNTL + info->clk_wr_offset, 0, info);
 					/* better call aty_StrobeClock ?? */
-    aty_st_8(CLOCK_CNTL + info->clk_wr_offset, CLOCK_STROBE, info);
+    if (M64_HAS(MOBIL_BUS)&&M64_HAS(XL_DLL))
+	aty_st_8(CLOCK_CNTL + info->clk_wr_offset, CLOCK_STROBE|CLOCK_SEL|CLOCK_DIV, info);
+    else
+	aty_st_8(CLOCK_CNTL + info->clk_wr_offset, CLOCK_STROBE, info);
 
     info->dac_ops->set_dac(info, &par->pll, par->crtc.bpp, accelmode);
     info->pll_ops->set_pll(info, &par->pll);
diff -rNu linux/drivers/video/aty/mach64_ct.c linux-custom/drivers/video/aty/mach64_ct.c
--- linux/drivers/video/aty/mach64_ct.c	2001-07-31 23:43:29.000000000 +0200
+++ linux-custom/drivers/video/aty/mach64_ct.c	2002-09-05 15:13:11.000000000 +0200
@@ -204,6 +204,11 @@
 	    break;
     }
 
+    if (M64_HAS(MOBIL_BUS)&&M64_HAS(XL_DLL)) {
+	pll->pll_ext_cntl |= 0xc8;
+	pll->mclk_fb_div -= 1;
+    }
+
     pll->pll_vclk_cntl = 0x03;	/* VCLK = PLL_VCLK/VCLKx_POST */
     pll->vclk_post_div = vpostdiv;
 }
@@ -250,8 +255,10 @@
 	else
 	    aty_st_pll(DLL_CNTL, 0xa0, info);
 	aty_st_pll(VFC_CNTL, 0x1b, info);
-	aty_st_le32(DSP_CONFIG, pll->ct.dsp_config, info);
-	aty_st_le32(DSP_ON_OFF, pll->ct.dsp_on_off, info);
+	if (!(M64_HAS(MOBIL_BUS)&&M64_HAS(XL_DLL))) {
+	    aty_st_le32(DSP_CONFIG, pll->ct.dsp_config, info);
+	    aty_st_le32(DSP_ON_OFF, pll->ct.dsp_on_off, info);
+	}
     }
 }