cpuspeed stuck in lowest speed after hibernate ?

Rick Stevens rstevens at vitalstream.com
Fri Jul 14 20:46:10 UTC 2006


On Fri, 2006-07-14 at 15:38 -0400, George Avrunin wrote:
> >>>>> On Fri, 14 Jul 2006 08:44:43 +0100, "CJ" == Chris Jones <jonesc at hep.phy.cam.ac.uk> wrote:
> 
>   CJ> Hi,
>   CJ> 
>   CJ> I have just noticed that sometimes (not everytime...) after a hibernate/resume 
>   CJ> cycle, my machine seems to be stuck in its lowest cpu speed state. It has 
>   CJ> worked fine for quite some time  (although I have only had hibernate working 
>   CJ> since FC5).
>   CJ> 
>   CJ> Has anyone else seen anything like this ? I include below extracts 
>   CJ> from /proc/. I have searched around in the logs but not really found 
>   CJ> anything, but then I'm not sure what to look for or where.
>   CJ> 
>   CJ> I thought it might be a 2.6.17 kernel issue, since I recently updated to 
>   CJ> 2.6.17-1.2145_FC5, but I see the same thing with 2.6.16-1.2133_FC5
>   CJ> 
>   CJ> cheers Chris
>   CJ> 
> 
> I'm seeing the same thing with 2.6.17-1.2145 on a Thinkpad T40.  I
> haven't had a chance to check with earlier kernels. I haven't found
> any way to speed the cpu back up without rebooting.

If you're running cpuspeed, then send that process a SIGUSR1:

	# killall -USR1 cpuspeed

----------------------------------------------------------------------
- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-  You know the old saying--any technology sufficiently advanced is  -
-               indistinguishable from a Perl script                 -
-                                 --Programming Perl, 2nd Edition    -
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