From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gunter Ohrner Subject: RE: cpufreq: powernow-k8 frequency transitions question Date: Tue, 03 Jan 2006 01:19:28 +0100 Message-ID: References: <84EA05E2CA77634C82730353CBE3A84303D430BD@SAUSEXMB1.amd.com> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="iso-8859-1" To: cpufreq@lists.linux.org.uk Devriendt, Paul wrote: > Transitions between low frequencies (<=3D1.4GHz) are not supported by > hardware. The way to do them is to transition to an intermediate > high frequency. Yes, I read about that in the PDF I referred to. I guess that#s the guide you also mentioned? > No BIOSs define two low PStates so the case never occurs, but it could > theoretically be done.=20 I'm currently experimenting with the speeds my CPU can run at. (Out of spec, at lower frequencies and voltages to safe a few watts and keep everything cool'n'quiet, so to say... ;) It seems to run fine a several low pstates, I just need to check if supporting low-low-transitions would be worth the hassle, or if I just limit my pstate table to two pstates between which the CPU can transition directly. Thanks a lot for your answer, Gunter --=20 Thunder rolled. ... It rolled a six. -- (Terry Pratchett,=20 Guards! Guards!) *** PGP-Verschl=FCsselung bei eMails erw=FCnscht :-) *** PGP: 0x1128F25F ***