[PATCH 0/3] CPU frequency scaling addon

[Holger Macht]

On Mon 14. Aug - 18:48:23, Richard Hughes wrote:
> On Sat, 2006-08-12 at 12:34 +0200, Holger Macht wrote:
> > Just save the mail. diff ignores everything except the diff.
> 
> Yes, that worked, thanks.
> 
> Apart from looking in /org/freedesktop/Hal/devices/computer:info.addons
> for the hald-addon-cpufreq addon name, is there a way for desktop
> programs to find out if HAL can manage CPU scaling?
> 
> Maybe we need a power_management.can_do_cpu_scaling key or something
> more suitable.


Maybe checking if the CPUFreq methods are listed in the
org.freedesktop.Hal.Device.SystemPowerManagement.method_names key is
enough?

And if so, use the GetCPUFreqAvailableGovernors method to check if there
are governors to be used.

> 
> I also noticed the addon doesn't exit if the computer doesn't have
> a /sys/devices/system/cpu/cpu0/cpufreq/ directory which would probably
> be a good thing.

But if a cpufreq driver (e.g. speedstep_centrino) or a governor is loaded
after the addon exited but during runtime of HAL, the system suddenly gets
CPUFreq capabilities but it couldn't be used anymore.


> 
> Richard.
> 
> 

Regards,
	Holger