Re: [3.14-rc3] possible regression Haswell runs only at 770Mhz with powersave governor

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On 02/20/2014 07:01 AM, Borislav Petkov wrote:
Add lists to CC.

On Thu, Feb 20, 2014 at 03:32:36PM +0100, Otto Meier wrote:
Hello,

My System which runs with older kernels up to 3.13.3
fine on my i3-4330 with 3.5 Ghz and governor powersave.
and pstate driver.

With kernel 3.14-rc3 and Governor powersave it runs
only at 770Mhz and never switches to higher Freq. on load.
Even compiling a kernel with make -j4   does not change freq.


commit fcb6a15c2e7e76d493e6f91ea889ab40e1c643a4 seems to be the culprit

With governor performance  it switches to 3.5 Ghz and stays
there.

Any Idea how to fix this?


Greg KH is seeing the same thing on his Haswell system.  I am trying
to figure what went south.

https://lkml.org/lkml/2014/2/19/626


Can you send me the .config for the broken kernel also the output of gcc -v



Best regards


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