New: cpufreq often stucks in lowest frequency.
https://bugzilla.kernel.org/show_bug.cgi?id=43037
Summary: cpufreq often stucks in lowest frequency.
Product: Power Management
Version: 2.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: cpufreq
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
Created an attachment (id=72798)
--> (https://bugzilla.kernel.org/attachment.cgi?id=72798)
Current linux configuration file
Although it works from time to time, cpufreq often stucks in the lowest frequency, and won't let the frequency go any higher, regardless of the governer. There is a discussion about this in here:
https://bbs.archlinux.org/viewtopic.php?pid=1082045
As it can be seen on the above thread, when this occurs, cpufreq-info gives this kind of output;
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0 1 2 3
CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 10.0 us.
hardware limits: 1.20 GHz - 2.53 GHz
available frequency steps: 2.53 GHz, 2.53 GHz, 2.40 GHz, 2.27 GHz, 2.13 GHz,
2.00 GHz, 1.87 GHz, 1.73 GHz, 1.60 GHz, 1.47 GHz, 1.33 GHz, 1.20 GHz
available cpufreq governors: ondemand, performance
current policy: frequency should be within 1.20 GHz and 1.20 GHz.
The governor "ondemand" may decide which speed to use within this range.
current CPU frequency is 1.20 GHz
As it can be seen, although it can see all available frequncies, but it will only use lowest frequency.
I am on "3.2.13-1-ARCH #1 SMP PREEMPT i686 Intel(R) Pentium(R) M processor 1.86GHz GenuineIntel", however, as you can see on the thread above, it's not the sole processor this problem happens.
Since this problem occurs from time to time (but often), I cannot provide a way to reproduce this error. I am adding
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[Bug 43037] cpufreq often stucks in lowest frequency.
https://bugzilla.kernel.org/show_bug.cgi?id=43037
--- Comment #1 from Yaşar Arabacı <[email protected]> 2012-04-03 15:51:07 --- Created an attachment (id=72799)
--> (https://bugzilla.kernel.org/attachment.cgi?id=72799)
Output of lspci -vv
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[Bug 43037] cpufreq often stucks in lowest frequency.
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=43037
--- Comment #2 from Yaşar Arabacı <[email protected]> 2012-04-03 16:07:32 --- Created an attachment (id=72800)
--> (https://bugzilla.kernel.org/attachment.cgi?id=72800)
cat /proc/cpuinfo
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[Bug 43037] cpufreq often stucks in lowest frequency.
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=43037
--- Comment #3 from Yaşar Arabacı <[email protected]> 2012-04-04 17:06:54 --- Created an attachment (id=72814)
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dmesg output while bug is happening
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[Bug 43037] cpufreq often stucks in lowest frequency.
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=43037
--- Comment #4 from Yaşar Arabacı <[email protected]> 2012-04-04 17:11:33 --- Created an attachment (id=72815)
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lsmod output while bug is happenning
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[Bug 43037] cpufreq often stucks in lowest frequency.
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=43037
--- Comment #5 from Yaşar Arabacı <[email protected]> 2012-04-04 17:17:17 --- Created an attachment (id=72816)
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acpidump during bug
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[Bug 43037] cpufreq often stucks in lowest frequency.
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=43037
--- Comment #6 from Yaşar Arabacı <[email protected]> 2012-04-04 18:43:31 --- Created an attachment (id=72817)
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cpu info while the error is happening
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[Bug 43037] cpufreq often stucks in lowest frequency.
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=43037
Alan <[email protected]> changed:
What |Removed |Added
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CC| |[email protected] AssignedTo|[email protected] |[email protected]
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