[Bug 58001] "ondemand" CPU governor never raises frequency (Dell XPS 12)

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=58001





--- Comment #1 from Viresh Kumar <viresh.kumar@linaro.org>  2013-05-12 15:32:26 ---
On Sat, May 11, 2013 at 3:02 PM,  <bugzilla-daemon@bugzilla.kernel.org> wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=58001
>
>            Summary: "ondemand" CPU governor never raises frequency (Dell
>                     XPS 12)
>            Product: Power Management
>            Version: 2.5
>     Kernel Version: 3.8.11-200.fc18.x86_64
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: cpufreq
>         AssignedTo: cpufreq@vger.kernel.org
>         ReportedBy: jylefort@gmail.com
>         Regression: No
>
>
> On a Dell XPS 12 (Intel Core i7-3537U), I experience exactly the same symptoms
> as in bug #14771, except it has nothing to do with the power supply: I'm using
> the stock power supply, and the problematic behavior is observed both on
> battery and on AC power.
>
> If I keep the default settings, the CPU frequency never goes beyond the 800 MHz
> minimum, regardless of the CPU load.
>
> If I decrease /sys/devices/system/cpu/cpufreq/ondemand/up_threshold from the
> default value of 95 to 75, then the processors dynamically switch back and
> forth from 800 MHz to 2 GHz according to CPU load.

It sort of means system isn't loaded well :)

Can you paste/attach output of cpufreq-info?

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