Bug#536183: Can't change CPU scaling governor after .29 to .30 upgrade.

[Moritz Muehlenhoff <jmm@inutil.org>]

Hi Trent,

On Fri, Feb 26, 2010 at 09:57:37AM +1100, Trent W. Buck wrote:
> Moritz Muehlenhoff wrote:
> >> After upgrading from .29 to .30, I can no longer change my CPU
> >> frequency scaling governor: [...]
> >
> > The next release of Debian (6.0, code name Squeeze) will be based on
> > 2.6.32. Please test the current 2.6.32 from unstable/testing and
> > tell us whether the problem persists.
> 
> It does:
> 
>     # uname -a
>     Linux Clio 2.6.32-trunk-686 #1 SMP Sun Jan 10 06:32:16 UTC 2010 i686 GNU/Linux
>     # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
>     ondemand performance
>     # printf ondemand >/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
>     # cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
>     performance
>     # dmesg | tail -1
>     [38198.312686] ondemand governor failed, too long transition latency of HW, fallback to performance governor
>     #
> 
> > If so, we should report it upstream to the kernel.org developers.
> 
> Do you need me to take further action, or can I leave that part to
> you?
 
Please report this bug upstream at the upstream bugzilla
(http://bugzilla.kernel.org), so that it can be investigated/
fixed upstream and backported for Squeeze.

Once done, please add the bug number to this bug.

(We're asking you to file the bug report yourself, since the
kernel.org developers will have specific inquiries to your
hardware/setup)

Cheers,
        Moritz