* Using intel_pstate
@ 2014-02-22 22:48 Phillip Susi
2014-02-23 1:23 ` Rafael J. Wysocki
0 siblings, 1 reply; 3+ messages in thread
From: Phillip Susi @ 2014-02-22 22:48 UTC (permalink / raw)
To: linux-acpi@vger.kernel.org
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The intel_pstate driver says it should be the preferred driver on
sandy bridge systems, but my system is using the acpi p state driver
instead. According to the cpufreq Makefile this appears to be
intended as it is placed first in the link order. Why is this and how
can I make sure the intel_pstate driver is used instead?
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Using intel_pstate
2014-02-22 22:48 Using intel_pstate Phillip Susi
@ 2014-02-23 1:23 ` Rafael J. Wysocki
2014-02-23 4:11 ` Phillip Susi
0 siblings, 1 reply; 3+ messages in thread
From: Rafael J. Wysocki @ 2014-02-23 1:23 UTC (permalink / raw)
To: Phillip Susi; +Cc: linux-acpi@vger.kernel.org
On Saturday, February 22, 2014 05:48:46 PM Phillip Susi wrote:
> The intel_pstate driver says it should be the preferred driver on
> sandy bridge systems, but my system is using the acpi p state driver
> instead. According to the cpufreq Makefile this appears to be
> intended as it is placed first in the link order. Why is this and how
> can I make sure the intel_pstate driver is used instead?
Do you have CONFIG_X86_INTEL_PSTATE=y set in your .config?
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Using intel_pstate
2014-02-23 1:23 ` Rafael J. Wysocki
@ 2014-02-23 4:11 ` Phillip Susi
0 siblings, 0 replies; 3+ messages in thread
From: Phillip Susi @ 2014-02-23 4:11 UTC (permalink / raw)
To: Rafael J. Wysocki; +Cc: linux-acpi@vger.kernel.org
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On 02/22/2014 08:23 PM, Rafael J. Wysocki wrote:
> On Saturday, February 22, 2014 05:48:46 PM Phillip Susi wrote:
>> The intel_pstate driver says it should be the preferred driver
>> on sandy bridge systems, but my system is using the acpi p state
>> driver instead. According to the cpufreq Makefile this appears
>> to be intended as it is placed first in the link order. Why is
>> this and how can I make sure the intel_pstate driver is used
>> instead?
>
> Do you have CONFIG_X86_INTEL_PSTATE=y set in your .config?
Nevermind.. turns out Ubuntu has a patch to disable it by default and
you have to explicitly pass intel_pstate=enable to turn it on.
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^ permalink raw reply [flat|nested] 3+ messages in thread
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