KDE 4.4, anyone got CPU scaling support?

[Chris Smart]

Hi all,

I've noticed that with a fresh Fedora install of KDE 4.4, PowerDevil
is saying that my system does not support CPU scaling. However, I do
have acpi_cpufreq, cpufreq_ondemand, etc loaded, and the cpufreq
command works from the terminal (as root).

So, before I log a bug, does anyone have a KDE 4.4 install where
PowerDevil *does* report support for CPU scaling?

System Settings -> Advanced tab -> Power Management -> Capabilities
(check "scaling capability").

Thanks,
Chris

[Chris Smart]

On Wed, Mar 3, 2010 at 9:39 AM, Chris Smart  wrote:
> So, before I log a bug, does anyone have a KDE 4.4 install where
> PowerDevil *does* report support for CPU scaling?

Of course, just as I send that, I found a bug report:
"https://bugzilla.redhat.com/show_bug.cgi?id=550486"

Still, would be interesting to know if anyone does have this working
or not. It means I can't manage my laptop's performance under KDE,
which is annoying (I'll just do it with a script if need be, but would
be nice to have it all in one place).

-c

[Martin Kho]

> On Wed, Mar 3, 2010 at 9:39 AM, Chris Smart

wrote:
> > So, before I log a bug, does anyone have a KDE 4.4 install where
> > PowerDevil *does* report support for CPU scaling?
>
> Of course, just as I send that, I found a bug report:
> "https://bugzilla.redhat.com/show_bug.cgi?id=550486"
>
> Still, would be interesting to know if anyone does have this working
> or not. It means I can't manage my laptop's performance under KDE,
> which is annoying (I'll just do it with a script if need be, but would
> be nice to have it all in one place).

Hi,
Not working. PowerDevil tells me that my system doesn't have "Scaling 
capability", although all kernel modules are loaded. I thought, it's because 
I'm just a dull desktop user :-)

Martin Kho
> -c
> _______________________________________________
> kde mailing list
> [e-mail]
> https://admin.fedoraproject.org/mailman/listinfo/kde
> New to KDE4? - get help from http://userbase.kde.org

[Chris Smart]

On Wed, Mar 3, 2010 at 11:50 AM, Martin Kho  wrote:
> Hi,
> Not working. PowerDevil tells me that my system doesn't have "Scaling
> capability", although all kernel modules are loaded. I thought, it's because
> I'm just a dull desktop user :-)

Thanks Martin,

If you run:
su -c 'cpufreq --info'

on the terminal, does that show information? If so, that means your
system is configured correctly (and you should be able to change it
with cpufreq -g ondemand, etc) and that it's a KDE problem.

-c

[Patrick Boutilier]

On 03/02/2010 08:52 PM, Chris Smart wrote:
> On Wed, Mar 3, 2010 at 11:50 AM, Martin Kho  wrote:
> > Hi,
> > Not working. PowerDevil tells me that my system doesn't have "Scaling
> > capability", although all kernel modules are loaded. I thought, it's because
> > I'm just a dull desktop user :-)
>
> Thanks Martin,
>
> If you run:
> su -c 'cpufreq --info'
>
> on the terminal, does that show information? If so, that means your
> system is configured correctly (and you should be able to change it
> with cpufreq -g ondemand, etc) and that it's a KDE problem.

On Fedora 12 the command is actually cpufreq-info . Not sure about 
earlier versions.
> -c
> _______________________________________________
> kde mailing list
> [e-mail]
> https://admin.fedoraproject.org/mailman/listinfo/kde
> New to KDE4? - get help from http://userbase.kde.org

[Martin Kho]

> On 03/02/2010 08:52 PM, Chris Smart wrote:
> > On Wed, Mar 3, 2010 at 11:50 AM, Martin Kho  wrote:
> > > Hi,
> > > Not working. PowerDevil tells me that my system doesn't have "Scaling
> > > capability", although all kernel modules are loaded. I thought, it's
> > > because I'm just a dull desktop user :-)
> >
> > Thanks Martin,
> >
> > If you run:
> > su -c 'cpufreq --info'
> >
> > on the terminal, does that show information? If so, that means your
> > system is configured correctly (and you should be able to change it
> > with cpufreq -g ondemand, etc) and that it's a KDE problem.
>
> On Fedora 12 the command is actually cpufreq-info . Not sure about
> earlier versions.

Hi Chris,

Running cpufreq-info (as Patrick suggested) gives:

---
[martin@ps-1866 ~]$ cpufreq-info (no need to run as root)
cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to [e-mail], please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0 1
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 10.0 us.
  hardware limits: 1.60 GHz - 1.86 GHz
  available frequency steps: 1.86 GHz, 1.60 GHz
  available cpufreq governors: ondemand, userspace, performance
  current policy: frequency should be within 1.60 GHz and 1.86 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.60 GHz.
analyzing CPU 1:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0 1
  CPUs which need to have their frequency coordinated by software: 1
  maximum transition latency: 10.0 us.
  hardware limits: 1.60 GHz - 1.86 GHz
  available frequency steps: 1.86 GHz, 1.60 GHz
  available cpufreq governors: ondemand, userspace, performance
  current policy: frequency should be within 1.60 GHz and 1.86 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.60 GHz.
---

With cpufreq-set -g <governor> (run as root) I can change the governor.

Martin Kho
> > -c
> > _______________________________________________
> > kde mailing list
> > [e-mail]
> > https://admin.fedoraproject.org/mailman/listinfo/kde
> > New to KDE4? - get help from http://userbase.kde.org
>
> kde mailing list
> [e-mail]
> https://admin.fedoraproject.org/mailman/listinfo/kde
> New to KDE4? - get help from http://userbase.kde.org

[Chris Smart]

On Wed, Mar 3, 2010 at 8:19 PM, Martin Kho  wrote:
> Running cpufreq-info (as Patrick suggested) gives:
>
> [martin@ps-1866 ~]$ cpufreq-info (no need to run as root)

Interesting.. you can run that as a normal user, whereas on my machine
I need to be root. Is your user in other groups other than yourself?

As an aside, looks like the KDE issue is to do with hal being built
without cpu-scaling support..

-c

[Martin Kho]

> On Wed, Mar 3, 2010 at 8:19 PM, Martin Kho  wrote:
> > Running cpufreq-info (as Patrick suggested) gives:
> >
> > [martin@ps-1866 ~]$ cpufreq-info (no need to run as root)
>
> Interesting.. you can run that as a normal user, whereas on my machine
> I need to be root. Is your user in other groups other than yourself?

No, may be a different version? My cpufreq-info is part of  
cpufrequtils-007-1.fc12.x86_64

The man-page says that it reads: /sys/devices/system/cpu/cpu*/cpufreq/

I can do as normal user:
$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
which gives me:
ondemand

Martin Kho
> As an aside, looks like the KDE issue is to do with hal being built
> without cpu-scaling support..
>
> -c
> _______________________________________________
> kde mailing list
> [e-mail]
> https://admin.fedoraproject.org/mailman/listinfo/kde
> New to KDE4? - get help from http://userbase.kde.org