From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Piel Subject: Re: Ondemand governor not working with kernel-2.6.12-12mdk Date: Thu, 06 Oct 2005 16:58:08 +0200 Message-ID: <43453B80.5060604@tremplin-utc.net> References: <20051006125246.56683.qmail@web32704.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20051006125246.56683.qmail@web32704.mail.mud.yahoo.com> 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=gmane.org+glkc-cpufreq=gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="iso-8859-1"; format="flowed" To: Alex Simonov Cc: cpufreq@www.linux.org.uk 10/06/2005 02:52 PM, Alex Simonov wrote/a =C3=A9crit: > Hello everybody, >=20 > Recently I installed Mandrake Linux with kernel > 2.6.12 on my laptop, and noticed, that the > ondemand governor is not working, only the > powersave, and performance governors. >=20 > Anyone has an idea what could be the reason? > Please tell me if you need any other info for > better diagnosing the problem. >=20 > The System is: >=20 > HP Omnibook 510 > Pentium III CPU 1133 Mhz/440BX chipset. > Cpufreq modules are compiled directly in the > kernel. Which driver does it use? Check it by doing: cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver My guess is that you use a driver which doesn't know the transition=20 latency and therefore the ondemand governor doesn't want to take the=20 job. The easiest workaround is to use any userspace program (like=20 cpufreqd), they are not as shy as the ondemand governor... The real way to fix it will be to find the correct transition latency of=20 your processor and update the driver. (If the driver is speedstep-ich,=20 I'm already working on it with Venki and I can send you a patch for trial) Eric