CPU speed after hibernation

CPU speed after hibernation

[Bhasker C V]

Hi all,

 I have enable suspend-to-disk on myetch system K 2.6.21.1
 I have enabled acpi cpu frequency scaling and using "convservative"
governer.

 When I boot the system, the cpu frequency works switches fine based on
the requirement. But when i go to hibernation and come back from
hibernation, the cpu frequency gets stuck at the maximum. 

 I have already written to debian-users list but did not get any reply
(with the same subject line). 
 Is this a known issue ?
 If i try to remove and re-insert the cpufreq_conservative module, the
whole system hangs.

thanks
-- 
Bhasker C V
To feel rich count all things you have in life that money can't buy.

Re: CPU speed after hibernation

[Rafael J. Wysocki]

On Friday, 12 October 2007 08:41, Bhasker C V wrote:
> Hi all,
> 
>  I have enable suspend-to-disk on myetch system K 2.6.21.1
>  I have enabled acpi cpu frequency scaling and using "convservative"
> governer.
> 
>  When I boot the system, the cpu frequency works switches fine based on
> the requirement. But when i go to hibernation and come back from
> hibernation, the cpu frequency gets stuck at the maximum. 
> 
>  I have already written to debian-users list but did not get any reply
> (with the same subject line). 
>  Is this a known issue ?
>  If i try to remove and re-insert the cpufreq_conservative module, the
> whole system hangs.

Please try 2.6.23.  If the problem is still there, please file a bug at
http://bugzilla.kernel.org, under "Power Management"->Hibernation/Suspend.

Greetings,
Rafael

Re: CPU speed after hibernation

[Bhasker C V]

Hi all,

 False alarm. 
 The cpu frequency works. But it takes a long time before it 
 brings down the cpu speed. Initialy (atleast for 3-4 minutes) the 
 CPU is kept at its high speed threshold and later the cpu throttling 
 happens.

On Fri, 2007-10-12 at 14:07 +0200, Rafael J. Wysocki wrote:
> On Friday, 12 October 2007 08:41, Bhasker C V wrote:
> > Hi all,
> > 
> >  I have enable suspend-to-disk on myetch system K 2.6.21.1
> >  I have enabled acpi cpu frequency scaling and using "convservative"
> > governer.
> > 
> >  When I boot the system, the cpu frequency works switches fine based on
> > the requirement. But when i go to hibernation and come back from
> > hibernation, the cpu frequency gets stuck at the maximum. 
> > 
> >  I have already written to debian-users list but did not get any reply
> > (with the same subject line). 
> >  Is this a known issue ?
> >  If i try to remove and re-insert the cpufreq_conservative module, the
> > whole system hangs.
> 
> Please try 2.6.23.  If the problem is still there, please file a bug at
> http://bugzilla.kernel.org, under "Power Management"->Hibernation/Suspend.
> 
> Greetings,
> Rafael
-- 
Bhasker C V
Registered Linux user: #306349 (counter.li.org)
The box said "Requires Windows 95, NT, or better", so I installed Linux.

Re: CPU speed after hibernation

[Pavel Machek]

On Fri 2007-10-12 21:00:50, Bhasker C V wrote:
> Hi all,
> 
>  False alarm. 
>  The cpu frequency works. But it takes a long time before it 
>  brings down the cpu speed. Initialy (atleast for 3-4 minutes) the 
>  CPU is kept at its high speed threshold and later the cpu throttling 
>  happens.

Strange.... do you know why? Some kind of userspace governor that
relies on load average?
							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html