Date: Mon, 01 Nov 2010 12:53:03 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: jt@xoasis.de Cc: freebsd-acpi@freebsd.org Subject: Re: est CPU support Message-ID: <4CCE9C0F.6060907@icyb.net.ua> In-Reply-To: <201011011052.11084.jt@xoasis.de> References: <201011011052.11084.jt@xoasis.de>
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on 01/11/2010 11:52 Joerg Traeger said the following: > Hi, > > I have got several mainboards with CPUs which appear not to be > supportet by est. An error exists: > > (examle of somewhat older Intel DG45FC with DualCore E5200 and latest BIOS) > > est0: <Enhanced SpeedStep Frequency Control> on cpu0 > est: CPU supports Enhanced Speedstep, but is not recognized. > est: cpu_vendor GenuineIntel, msr 61a4c1f06004c1f > device_attach: est0 attach returned 6 <---------- Do you have ACPI enabled? > p4tcc0: <CPU Frequency Thermal Control> on cpu0 > [...] > est1: <Enhanced SpeedStep Frequency Control> on cpu1 > est: CPU supports Enhanced Speedstep, but is not recognized. > est: cpu_vendor GenuineIntel, msr 61a4c1f06004c1f > device_attach: est1 attach returned 6 > p4tcc1: <CPU Frequency Thermal Control> on cpu1 > > Searching the net I found several hints this CPU (Intel DualCore E5200) _is_ > supported by EST and the voltage is being reduced in idle states like > intended. > So it looks like there are more things which might break success using est for > me. Can you explain what may be a reason for this problem? In the past it was > about hardcoding cpu data about voltages into the source but as I know this > is not the case anymore but ACPI is involved. > Is the BIOS likely to be the reason or is it an ignored CPU stepping or...? > > Same happens with the new CPU Intel Atom N550 on a Jetway board called > NC9c-550-LF. est does not attach and some watts are wasted. > > Thank you! -- Andriy Gapon
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