diff --unified --recursive --new-file linux-2.6.5/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c linux-2.6.5.speedstep/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c
--- linux-2.6.5/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c	2004-06-07 20:49:36.000000000 +0000
+++ linux-2.6.5.speedstep/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c	2004-06-08 22:56:06.911397232 +0000
@@ -210,8 +210,17 @@
 		ebx = cpuid_ebx(0x00000001);
 		ebx &= 0x000000FF;
 
-		dprintk(KERN_INFO "ebx value is %x, x86_mask is %x\n", ebx, c->86_mask);
+		dprintk(KERN_INFO "ebx value is %x\n", ebx);
 
+		dprintk(KERN_INFO "model_id is %s\n", c->x86_model_id);
+		
+		/*
+		 * If the x86_model_id string contais "Mobile Intel(R) Pentium(R) 4"
+                 * omit all other checks and treat the CPU as a M-P4-M
+		 */
+		if (strstr(c->x86_model_id,"Mobile Intel(R) Pentium(R) 4") != NULL)
+		       return SPEEDSTEP_PROCESSOR_P4M;
+		
 		switch (c->x86_mask) {
 		case 4: 
 			/*
@@ -248,6 +257,7 @@
 			 * So, how to distinguish all those processors with
 			 * ebx=0xf? I don't know. Sort them out, and wait
 			 * for someone to complain.
+			 * also, M-P4M HTs actually have ebx=0x8, too
 			 */
 			if (ebx == 0x0e)
 				return SPEEDSTEP_PROCESSOR_P4M;