linux-kernel - Re: speedstep-centrino: ENODEV

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Date:	Thu, 19 Oct 2006 16:20:34 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
CC:	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: speedstep-centrino: ENODEV

Pallipadi, Venkatesh wrote:
> How about acpi-cpufreq? Does it work?

How did you mean this, speedstep-centrino (which can also control voltage) is 
one of acpi-cpufreq drivers, isn't it?

> 
> Thanks,
> Venki 
> 
>> -----Original Message-----
>> From: linux-kernel-owner@...r.kernel.org 
>> [mailto:linux-kernel-owner@...r.kernel.org] On Behalf Of Jiri Slaby
>> Sent: Wednesday, October 18, 2006 12:01 PM
>> To: Linux kernel mailing list
>> Cc: linux-acpi@...r.kernel.org
>> Subject: speedstep-centrino: ENODEV
>>
>> Hi!
>>
>> How is it possible to find out whether or not 
>> speedstep-centrino is supported. I 
>> have
>> processor       : 0
>> vendor_id       : GenuineIntel
>> cpu family      : 6
>> model           : 13
>> model name      : Intel(R) Pentium(R) M processor 1.60GHz
>> stepping        : 6
>> cpu MHz         : 1600.149
>> cache size      : 2048 KB
>> fdiv_bug        : no
>> hlt_bug         : no
>> f00f_bug        : no
>> coma_bug        : no
>> fpu             : yes
>> fpu_exception   : yes
>> cpuid level     : 2
>> wp              : yes
>> flags           : fpu vme de pse tsc msr mce cx8 apic sep mtrr 
>> pge mca cmov pat 
>> clflush dts acpi mmx fxsr sse sse2 ss tm pbe est tm2
>> bogomips        : 3201.52
>>
>> processor, but speedstep-centrino returns ENODEV because of 
>> lack of _PCT et al 
>> entries in DSDT (http://www.fi.muni.cz/~xslaby/sklad/adump). 
>> It is possible to 
>> hard-code that values to speedstep-centrino as for banias cpus 
>> or use corrected 
>> DSDT that will contain _PCT, _PSS and _PPC, but where may I 
>> obtain these values?
>>
>> This is Asus M6R notebook, some DSDT parts of this piece of HW 
>> are really ugly 
>> (problems with acpi some time ago).
>>
>> I may use p4-clockmod (and it points me to speedstep-centrino 
>> module), but if I 
>> am correct, it doesn't save battery life?

regards,
-- 
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E
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