From: bugzilla-daemon@bugzilla.kernel.org
To: cpufreq@vger.kernel.org
Subject: [Bug 19702] i5-450M CPU gets stuck in low/lowest state
Date: Fri, 29 Oct 2010 20:15:32 GMT [thread overview]
Message-ID: <201010292015.o9TKFWVQ027195@demeter2.kernel.org> (raw)
In-Reply-To: <bug-19702-12968@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=19702
--- Comment #33 from Thomas Renninger <trenn@suse.de> 2010-10-29 20:15:27 ---
I wonder why Heinz has:
clocksource=hpet acpi_skip_timer_override
Peter's machine has an unstable TSC, that is strange, cpuflags show
constant_tsc.
So it seems it falls through some boot check to not increment constantly.
Hmm, you both seem to have problems with TSC..., aperf/mperf may be fed by the
same internal clock as TSC. If average frequency calced via aperf/mperf is very
low, the frequency would never get ramped up.
It's hard to believe, because you have so different CPUs, but it looks like you
both have broken TSC/aperf/mperf timers on CPU 0? At least Peter has?
Another patch to try.., please use:
acpi_cpufreq.disable_average=1
boot param and check dmesg that it got applied:
"acpi-cpufreq: average (aperf/mperf) accounting disabled by user"
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next prev parent reply other threads:[~2010-10-29 20:15 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-19702-12968@https.bugzilla.kernel.org/>
2010-10-04 6:42 ` [Bug 19702] i5-450M CPU gets stuck in low/lowest state bugzilla-daemon
2010-10-04 6:43 ` bugzilla-daemon
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2012-06-18 19:11 ` bugzilla-daemon
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