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Bug 217182 - speedstep centrino support not enabled in kernel
speedstep centrino support not enabled in kernel
Status: CLOSED DUPLICATE of bug 211941
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Kernel Maintainer List
Brian Brock
Depends On:
  Show dependency treegraph
Reported: 2006-11-24 13:56 EST by Stephen Hemminger
Modified: 2008-08-02 19:40 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2006-11-24 19:25:41 EST
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RHEL 7.3 requirements from Atomic Host:

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Description Stephen Hemminger 2006-11-24 13:56:57 EST
Description of problem:
Since the cpu frequency control for Pentium-M is not enabled by default
in the FC6 kernel (CONFIG_X86_SPEEDSTEP_CENTRINO). There is no frequency
control and laptop always runs full speed.

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

How reproducible:

Steps to Reproduce:
1. boot
2. look for cpufreq in /sys (it's missing)
3. frequency control from gnome-power-manager etc can't work

It works if I build a upstream kernel and enable it.  

Actual results:

Expected results:

Additional info:
Is this intentional or unintentional
Comment 1 Dave Jones 2006-11-24 16:48:31 EST

$ grep SPEEDSTEP /boot/config-2.6.18-1.2849.fc6 

Oh, I bet I know what this is.  I bet you've been bitten by the "installer
installs a 586 kernel by default" bug.  
See  and see if that's the problem.

If that still doesn't get you up and running, attach dmesg, and I'll poke at it
some more.
Comment 2 Stephen Hemminger 2006-11-24 19:25:41 EST

*** This bug has been marked as a duplicate of 211941 ***

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