* Fw: [Bugme-new] [Bug 5435] New: Powernow code has random CPU speed
@ 2005-10-14 4:42 Andrew Morton
2005-10-14 5:05 ` Dave Jones
0 siblings, 1 reply; 3+ messages in thread
From: Andrew Morton @ 2005-10-14 4:42 UTC (permalink / raw)
To: cpufreq
Begin forwarded message:
Date: Thu, 13 Oct 2005 20:24:07 -0700
From: bugme-daemon@kernel-bugs.osdl.org
To: bugme-new@lists.osdl.org
Subject: [Bugme-new] [Bug 5435] New: Powernow code has random CPU speed
http://bugzilla.kernel.org/show_bug.cgi?id=5435
Summary: Powernow code has random CPU speed
Kernel Version: 2.6.14-rc4
Status: NEW
Severity: normal
Owner: johnstul@us.ibm.com
Submitter: Larry.Finger@lwfinger.net
Most recent kernel where this bug did not occur: 2.6.13 ?
Distribution: SuSE 10.0
Hardware Environment: HP ze1115 notebook with 1100 MHz clock
Software Environment:
Problem Description: Processor speed determined at startup seems to be random
Steps to reproduce: Just boot and look at 'dmesg' output.
========================================================================
When it works correctly:
powernow: PowerNOW! Technology present. Can scale: frequency and voltage.
Detected 1100.247 MHz processor.
powernow: SGTC: 10000
powernow: Minimum speed 500 MHz. Maximum speed 1100 MHz.
=========================================================================
When it fails, speeds are random:
powernow: PowerNOW! Technology present. Can scale: frequency and voltage.
Detected 7352.734 MHz processor.
powernow: No PST tables match this cpuid (0x771)
powernow: This is indicative of a broken BIOS.
powernow: Trying ACPI perflib
powernow: Minimum speed 3342 MHz. Maximum speed 7352 MHz.
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Fw: [Bugme-new] [Bug 5435] New: Powernow code has random CPU speed
2005-10-14 4:42 Fw: [Bugme-new] [Bug 5435] New: Powernow code has random CPU speed Andrew Morton
@ 2005-10-14 5:05 ` Dave Jones
2005-10-14 5:17 ` Andrew Morton
0 siblings, 1 reply; 3+ messages in thread
From: Dave Jones @ 2005-10-14 5:05 UTC (permalink / raw)
To: Andrew Morton; +Cc: cpufreq
On Thu, Oct 13, 2005 at 09:42:05PM -0700, Andrew Morton wrote:
> powernow: PowerNOW! Technology present. Can scale: frequency and voltage.
> Detected 7352.734 MHz processor.
> powernow: No PST tables match this cpuid (0x771)
> powernow: This is indicative of a broken BIOS.
> powernow: Trying ACPI perflib
> powernow: Minimum speed 3342 MHz. Maximum speed 7352 MHz.
My gut feeling is that this is an ACPI regression, as the powernow-k7
driver hasn't changed dramatically recently, and in this dmesg,
we've fallen back to using the ACPI.
Something else that's really odd is that the 'Detected' line seems
to have found a 7GHz CPU, which is novel.
Dave
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Fw: [Bugme-new] [Bug 5435] New: Powernow code has random CPU speed
2005-10-14 5:05 ` Dave Jones
@ 2005-10-14 5:17 ` Andrew Morton
0 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2005-10-14 5:17 UTC (permalink / raw)
To: Dave Jones; +Cc: acpi-devel, cpufreq
Dave Jones <davej@redhat.com> wrote:
>
> On Thu, Oct 13, 2005 at 09:42:05PM -0700, Andrew Morton wrote:
>
> > powernow: PowerNOW! Technology present. Can scale: frequency and voltage.
> > Detected 7352.734 MHz processor.
> > powernow: No PST tables match this cpuid (0x771)
> > powernow: This is indicative of a broken BIOS.
> > powernow: Trying ACPI perflib
> > powernow: Minimum speed 3342 MHz. Maximum speed 7352 MHz.
>
> My gut feeling is that this is an ACPI regression, as the powernow-k7
> driver hasn't changed dramatically recently, and in this dmesg,
> we've fallen back to using the ACPI.
>
> Something else that's really odd is that the 'Detected' line seems
> to have found a 7GHz CPU, which is novel.
>
OK, thanks.
Could one of the ACPI guys please take a look at 5435 and grab it if
appropriate?
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2005-10-14 5:17 UTC | newest]
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2005-10-14 4:42 Fw: [Bugme-new] [Bug 5435] New: Powernow code has random CPU speed Andrew Morton
2005-10-14 5:05 ` Dave Jones
2005-10-14 5:17 ` Andrew Morton
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