From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Renninger Subject: Re: problems setting freq on dual core t2600, 2.6.17-1.2157_FC5smp Date: Tue, 08 Aug 2006 14:52:52 +0200 Message-ID: <1155041572.4302.868.camel@queen.suse.de> References: <8be731880608061243m10d3944bv3e38b7247d4959a0@mail.gmail.com> Reply-To: trenn@suse.de Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <8be731880608061243m10d3944bv3e38b7247d4959a0@mail.gmail.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=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii" To: tobias.bocanegra@day.com Cc: cpufreq@lists.linux.org.uk On Sun, 2006-08-06 at 21:43 +0200, Tobias Bocanegra wrote: > > it working! it was the processor_perflib and not the processor_thermal. > i commented the call to cpufreq_verify_within_limits() and now i can > set the 2.17ghz. i just wonder how to control the powerstates in > perflib? Sorry for reading that so late. I got two reports about this problem (X60 and HP nx9420). Both with a Core Duo CPU (T2400). On the X60 it was hard to reproduce and the phenomenon vanished for the X60 when changing a performance-management setting in BIOS from "Powersave" to "Automatic". https://bugzilla.novell.com/show_bug.cgi?id=177963 On the HP nx9420 (nc6320 and nx7400 should also be affected) I could identify that _PPC always returned 1. But the value calculated in _PPC comes from several function invocations and I gave up as I hoped some HP BIOS guys would have a look at it. https://bugzilla.novell.com/show_bug.cgi?id=179702 This is no cpufreq, but an ACPI/AML problem. Maybe someone who owns such a machine could do an ACPI_DEBUG trace when _PPC is entered. Adding these two lines (ACPI_DEBUG=y must be compiled into kernel) around the acpi_evaluated_integer() call should limit acpi debug output to a sane level. Better unload all unnecessary ACPI modules (thermal/fan/..) before loading acpi-cpufreq/speedstep-centrino: drivers/acpi/processor_perf.c: acpi_dbg_level=0xFFFFFFFF; status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc); acpi_dbg_level=0x3; It would be nice if we could go on with the novell bug, if people do not like to open an account there, please open a separate bugzilla.kernel.org bug and take me into CC. Please also describe the affected model and attach acpidump output. Thanks, Thomas