RE: CPU scaling problems
From: Mark Allums [mailto:email@example.com]
Sent: Thursday, November 15, 2012 12:34 PM
Subject: RE: CPU scaling problems
>>>>> Francesco wrote:
I have installed Debian testing on a X1 Carbon, processor i5-3427U.
My problem is the following: when the `ondemand' governor is active, the
processor clock never scales up, it always stays at 800Mhz. The situation
changes when using the `conservative' or the `performance' governors. More
curiously, if I set `conservative'/`performance' as the governor for at
least one core, the CPU will scale. I am on the 3.6.6-trunk-amd64 kernel
from experimental because the intel video driver 3.2 causes random freezes.
To test if the scaling occurs I run `stress -c 4'.
Things I have tried:
* Enabling/disabling `cpufreqd', `laptop-mode', and `acpid'. I currently
* The 3.2 kernel in testing
* Enabling/disabling the `xfce4-power-manager', which I use to manage
There are some kind-of relevant BIOS options and I will try with those soon
but I doubt that's the issue.
Does anybody have any idea on how to troubleshoot such a problem? I suspect
that the problem is either in the kernel or in some other software which is
regulating the scaling.
> At a guess, I would assume a configuration problem. Or no problem. Is
your machine sluggish or unresponsive? How do you know it stays at 800 MHz?
What > tool do you use to monitor it? Maybe your monitor is wrong. I am
not sure how to troubleshoot this, but if you don't need the governor, turn
it off or use the > 'performance' one.
> If you solve the problem, let us know the solution, it may be useful to
> Good luck!
Sorry, I should have said, Have you tried *another* monitor tool besides