From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dominik Brodowski Subject: Re: Centrino question Date: Sat, 8 May 2004 19:54:41 +0200 Sender: cpufreq-bounces@www.linux.org.uk Message-ID: <20040508175441.GA7624@dominikbrodowski.de> References: <20040508133527.69aae7b8.neurowork@free.fr> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0130401452==" Return-path: In-Reply-To: <20040508133527.69aae7b8.neurowork@free.fr> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: cpufreq-bounces+glkc-cpufreq=gmane.org@www.linux.org.uk To: Cyril Wattebled Cc: cpufreq@www.linux.org.uk --===============0130401452== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="+HP7ph2BbKc20aGI" Content-Disposition: inline --+HP7ph2BbKc20aGI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, May 08, 2004 at 01:35:27PM +0000, Cyril Wattebled wrote: > Hi there, >=20 > I'm wondering if all Pentium M processor support C1 C2 and C3 ? > Because I have a Sony Vaio Z1 with a Pentium M 1.7ghz and it only support= s C1 > and C2. I have a friend who has a Toshiba Tecra with a Pentium M 1.4ghz a= nd it > supports C3. > So that's it, if any of you have time to answer =3D] AFAIK, all Pentium M _processors_ do support C1, C2, C3 and C4; it may be a chipset or platform-specific problem so that C3 is disabled. FYI, the ipw2100 driver sometimes fails if the CPU is in C3; maybe a related/similar problem has caused some vendor to disable C3. Also, C4 (and possibly C3 in your case) can also be specified in a 2.0 extension to the ACPI tables which is not yet used by the acpi processor driver (drivers/acpi/processor.c) -- but there is a patch on bugzilla.kernel.org to fix that already. Please direct future mails about Cx states to the acpi development list, as it has nothing to do with CPU frequency scaling. Dominik --+HP7ph2BbKc20aGI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFAnR7hZ8MDCHJbN8YRAgSGAKCNeOIS1+ZGhZxwXvNo0U7QmetR7QCdGfDC mkUZLjktLNGovfc1l3S8cl8= =wiXb -----END PGP SIGNATURE----- --+HP7ph2BbKc20aGI-- --===============0130401452== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Cpufreq mailing list Cpufreq@www.linux.org.uk http://www.linux.org.uk/mailman/listinfo/cpufreq --===============0130401452==--