Bug 500023 - Random freeze in ondemand mode
Random freeze in ondemand mode
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
All Linux
low Severity medium
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
: Triaged
Depends On:
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Reported: 2009-05-10 04:42 EDT by chanueting
Modified: 2009-12-18 04:25 EST (History)
2 users (show)

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Doc Type: Bug Fix
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Last Closed: 2009-12-18 04:25:02 EST
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Description chanueting 2009-05-10 04:42:14 EDT
Description of problem:
There is freeze randomly using the ondemand mode, other modes tried without having a freeze.

Version-Release number of selected component (if applicable):

How reproducible:
Randomly, may be after three hours or several minutes after changing to on demand mode.

Steps to Reproduce:
1.Changing the cpu frequency by either terminal using echo or through gnome-sensor-applet
Actual results:
Neither mouse or keyboard can be used.
And the screen show something like X is crashed.

Expected results:
Probably no freeze

Additional info:
Tell me if you need any logs.
Comment 1 chanueting 2009-05-10 04:44:12 EDT
GNOME CPU Frequency Applet is used instead of gnome-sensor-applet. Sorry for type error.
Comment 2 Chuck Ebbert 2009-05-20 20:52:18 EDT
What command are you running from the terminal to change the frequency?
Comment 3 chanueting 2009-05-22 03:52:49 EDT
I don't type any command to change the frequency, but the kernel module changes the frequency, while the ondemand mode is set as default.
Comment 4 Chuck Ebbert 2009-05-22 17:19:44 EDT
(In reply to comment #3)
> I don't type any command to change the frequency, but the kernel module changes
> the frequency, while the ondemand mode is set as default.  

In the original report you said

"Steps to Reproduce:
1.Changing the cpu frequency by either terminal using echo or through

How were you using echo in a terminal that caused the problem?
Comment 5 chanueting 2009-05-23 01:05:31 EDT
Sorry for the indistinctness in my text above. I think I should describe the situation again. I turn on the Cool n quiet on my motherboard. With the default setting with ondemand mode. My system would crash after I start programs which would make the CPU frequency changes. I tried to select the ondemand mode manually using modprobe and also GNOME CPU Frequency Applet do not solve this problem.
Comment 6 chanueting 2009-05-23 01:26:21 EDT
Sorry for the typos, I was just going to state that I change the frequency using "echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor"
Comment 7 Bug Zapper 2009-11-18 06:55:50 EST
This message is a reminder that Fedora 10 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 10.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '10'.

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to a later Fedora version prior to Fedora 10's end of life.

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Comment 8 Bug Zapper 2009-12-18 04:25:02 EST
Fedora 10 changed to end-of-life (EOL) status on 2009-12-17. Fedora 10 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
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