Unavailable frequencies for P4 processor
vikigoyal at gmail.com
Wed Jul 26 15:27:34 UTC 2006
On Tue, Jul 25, 2006 at 12:01:37PM -0400, Dave Jones wrote:
> On Tue, Jul 25, 2006 at 09:11:41PM +0530, Vikram Goyal wrote:
> > Hi,
> > I am using FC5 on a P4 Hyperthreading 865GBF board.
> > Previously I used to use ondemand cpufreq mod and set my cpu min speed
> > at 900Mhz to max 2.4Ghz. But now there are on only two freq available i.e
> > 2.1Ghz and 2.4Ghz in:
> > [root at fc5host ~]# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
> > 2100000 2400000
> > The cpufreq drv which applies to my hardware is p4-clockmod
> > I don't understand how may I use cpufreq as before.
> There exists a possibility of lockups due to CPU errata, so the erroneous
> frequencies have been removed.
That means this modification has been done in the kernel code and is not
due to some setting, which is what I was thinking initially.
I had even compiled kernel for myself but the results were the same, so
I thought, maybe I have overlooked something in menuconfig.
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