[ltp] X300 getting stuck on lowest frequency

[Mark Rosenstand]

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On Fri, Nov 21, 2014 at 5:54 PM, Alexandre Kalmeijer <
sacha.kalmeijer@gmail.com> wrote:

> I had this issue when I ran my X220 only on AC,
> the thing is that when no battery is present the bios will lock frequency.
>
> If this is not the case for then I would suggest downloading tlp and
> trying to set freq manually. gl
>

The battery is present at all times, and unplugging/re-plugging doesn't
make any difference.
However it does seem to be the BIOS limiting the frequency. If I set
/sys/module/processor/parameters/ignore_ppc to 1, I can successfully set
scaling_max_freq to 1200 MHz while bios_limit is still at 800 MHz.
I suppose this is a bad workaround and unsafe. Any other ideas what could
trigger the BIOS to limit the frequency? The temperature is around 55C at
idle,
but never reach 65C thanks to fan regulation.

Thank you for your help :-)

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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On F=
ri, Nov 21, 2014 at 5:54 PM, Alexandre Kalmeijer <span dir=3D"ltr">&lt;<a h=
ref=3D"mailto:sacha.kalmeijer@gmail.com" target=3D"_blank">sacha.kalmeijer@=
gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(20=
4,204,204);border-left-style:solid;padding-left:1ex"><div dir=3D"ltr">I had=
 this issue when I ran my X220 only on AC,<div>the thing is that when no ba=
ttery is present the bios will lock frequency.=C2=A0</div><div><br></div><d=
iv>If this is not the case for then I would suggest downloading tlp and try=
ing to set freq manually. gl</div></div></blockquote><div><br></div><div>Th=
e battery is present at all times, and unplugging/re-plugging doesn&#39;t m=
ake any difference.</div><div>However it does seem to be the BIOS limiting =
the frequency. If I set</div><div>/sys/module/processor/parameters/ignore_p=
pc to 1, I can successfully set</div><div>scaling_max_freq to 1200 MHz whil=
e bios_limit is still at 800 MHz.</div><div>I suppose this is a bad workaro=
und and unsafe. Any other ideas what could</div><div>trigger the BIOS to li=
mit the frequency? The temperature is around 55C at idle,</div><div>but nev=
er reach 65C thanks to fan regulation.</div><div><br></div><div>Thank you f=
or your help :-)</div></div></div></div>

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