Messages in this thread Patch in this message | | | Date | Tue, 22 Jul 2003 16:23:53 +0200 | From | Dominik Brodowski <> | Subject | Re: 2.6.0-test1: CPUFreq not working, can't find sysfs interface |
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On Tue, Jul 22, 2003 at 04:18:39PM +0200, textshell@neutronstar.dyndns.org wrote: > So it seems to me that the BIOS doesn't have the tables for my Athlon > model/stepping. I tried to get a new bios from hp, but it didn't change anything > relevant (they changed something in the PSTs but did not add a new one for my > processor)
Indeed, that's the BUG().
> > I guess it's yet another BIOS problem... [as seen quite often wrt AMD > > PowerNow, unfortunately] > > I think it would be a good thing to display a Message explaining why powernow > isn't working to the user in the case that no relevant PST is found.
Patch appended at the end.
> Can you suggest any workaround for this problem, or is my only option to > complain to HP do supply an updated BIOS.
Well, you could try using the PST which mostly matches your system except the CPUID [PST #12, see below] -- if the values used are similar to the ones Windows XP uses. But this might be risky!!!
> I very much would like to have a way to override (or add to) the bios provided > values.
AFAIK, Dave Jones will add support to override the BIOS-provided tables.
> --DEBUG: 7a0 ?= 781 && 21 ?= 21, 11 ?= 11 > PST:12 (@0x4017d8dc) > cpuid: 0x781 fsb: 133 maxFID: 0x15 startvid: 0xb > num of p states in this table: 6 > FID: 0x12 (4.0x [532MHz]) VID: 0x13 (1.200V) > FID: 0x4 (5.0x [665MHz]) VID: 0x13 (1.200V) > FID: 0x6 (6.0x [798MHz]) VID: 0x13 (1.200V) > FID: 0x8 (7.0x [931MHz]) VID: 0x13 (1.200V) > FID: 0xe (10.0x [1330MHz]) VID: 0xe (1.300V) > FID: 0x15 (13.5x [1796MHz]) VID: 0xb (1.450V)
Dominik
diff -ruN linux-original/arch/i386/kernel/cpu/cpufreq/powernow-k7.c linux/arch/i386/kernel/cpu/cpufreq/powernow-k7.c --- linux-original/arch/i386/kernel/cpu/cpufreq/powernow-k7.c 2003-07-11 14:12:35.000000000 +0200 +++ linux/arch/i386/kernel/cpu/cpufreq/powernow-k7.c 2003-07-22 16:16:00.000000000 +0200 @@ -345,6 +345,7 @@ p+=2; } } + dprintk (KERN_INFO PFX "Did not find any PST table for this CPU -- exiting\n"); return -EINVAL; } p++; - 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/
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