Re: ondemand vs suspend.

[Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>]

On Mon, Jun 19, 2006 at 03:52:59PM -0700, Jeremy Fitzhardinge wrote:
> Pallipadi, Venkatesh wrote:
> > Yes. I am able to reproduce this 2.6.17-rc6 and trying to narrow it
> > down.
> >
> > Also, there is a known issue with ondemand and resuming anyway as the
> > second CPU will not be able to resume with ondemand, but instead will go
> > back to 'default' governor on initialization. 
> > So, even with this bug fixed, we cannot suspend-resume with ondemand
> > governor. Workaround for now can be just to switch to default governor
> > before suspend and go back to ondemand after resume, using initscripts. 
> >   
> I've noticed another problem, which may be related.  Sometimes after 
> resume, cpufreq seems to lose the ability to control the CPU speeds: 
> they stay at the lowest performance level, and don't change regardless 
> of what governor I set.  I'm seeing this on a T2400 Core Duo.  I'm not 
> sure if this is a speedfreq-centrino problem or cpufreq itself.
> 
>     J

Does it only happen on CPU 1 or both the CPUs? What does /sys/.../cpufreq
look like once you get to this stuck at lowest freq state? Does 
scaling_available_frequencies still show all the freqs.

Thanks,
Venki