Messages in this thread | | | Date | Sun, 14 Jul 2002 17:50:25 +0200 | From | Dominik Brodowski <> | Subject | Re: Linux 2.4.19-rc1-ac3 |
| |
On Sun, Jul 14, 2002 at 05:19:54PM +0200, Peter Osterlund wrote: > Dominik Brodowski <devel@brodo.de> writes: > > I tried speedstep but it didn't work because of this check in > speedstep_detect_processor: > > /* Intel Pentium 4 Mobile P4-M */ > if (c->x86_model != 2) > return 0; > > if (c->x86_mask != 4) > return 0; /* all those seem to support Enhanced > SpeedStep */ > > My cpu has model == 1 and mask == 2. Strange: According to the Intel docs (24919923.pdf and 25072104.pdf) as of June 2002, all P4-Ms have models have model "2" and mask "4", and none have model "1" and mask "2". What does /proc/cpuinfo say? And are you really sure it is a speedstep-capable P4-M?
I'm really doubtful of that, as the MSR_EBC_FREQUENCY_ID didn't change a bit while trying speedstep transitions:
> cpufreq: P4 - MSR_EBC_FREQUENCY_ID: 0x8a01fe00 0x0 <snip> > cpufreq: P4 - MSR_EBC_FREQUENCY_ID: 0x8a01fe00 0x0
> cpufreq: currently at low speed setting - 13800 MHz Obviously, this value is bogus, what's the correct CPU frequency of your notebook?
> So what can I do to make speedstep work? According to the notebook > manual, speedstep is supported on this computer. How old is it? Fresh-out-of-the-factory? Then there might, just might be some update to the P4 specifications not yet included in the documentation. And please send me a /proc/cpuinfo, just to make sure. And, BTW, have you tried ACPI and its "performance state" interface?
Dominik - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |