Philipp Kern <pk...@debian.org> writes:
> what does /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor show after
> deinstallation of powernowd?

It says "userspace".

After further investigation, here is what I understand:

* the default governor is "ondemand".
* powernowd changes this to "userspace" on startup.
* "aptitude purge powernowd" leaves it to "userspace".

Therefore, powernowd is indeed obsolete, but one must change the
governor manually to "ondemand" upon purging the package, or reboot.

I have not needed to install cpufrequtils.

> The throttling comments in this bug log are entirely bogus.  The fact that the
> *frequency* changes means that there's no throttling involved.

I thought that "throttling" referred precisely to changing the voltage
and frequency of the CPU, as opposed to changing the C-state?

> Furthermore this bug report is nowhere "serious".

I agree.  I hope you didn't think I was the one who claimed it was
serious.  It wasn't me.


Now looking back on this issue: I've had this laptop since November 2006
and I've been running Debian on it ever since.  The first version of
Linux I installed was 2.6.18 (from Etch).  I don't think Linux had the
"ondemand" scheduler back then, so a userspace daemon was necessary.

I suggest that perhaps a small paragraph should be added to the release
notes for Squeeze, explaining this issue to users upgrading their
kernel.

Thanks for your help.

-- 
Ludovic Brenta.



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