[CentOS] powernow-k8 in newer centosplus kernel

JohnS jses27 at gmail.com
Sat Apr 11 16:22:59 UTC 2009


On Fri, 2009-04-10 at 13:07 -0700, Nataraj wrote:
> On Fri, 2009-04-10 at 11:37 -0400, JohnS wrote:
> > On Fri, 2009-04-10 at 12:16 +0100, Karanbir Singh wrote:
> > > Mark Pryor wrote:
> > > > Using kernel:
> > > > 2.6.18-92.1.13.el5.centos.plus
> > > > the cpu throttling works as desired (see 2 traces below)
> > > ...
> > > > When I update to the newer xx-128.1.6 centosplus kernel all the throttling stops and the box runs at highest speed.
> > > 
> > > This is an issue that came up in the early 5.2 days, and has been 
> > > recurring since. I lost cpuspeed control on my desktop at home as well ( 
> > > amdx24800/m2n) with the kernel update. Have not started digging into 
> > > this, but the last time I did upstream blamed it on badly done acpi code 
> > > in the system BIOS. It *should* now be possible to blacklist the 
> > > powernow-k8.ko code and let the kernel fallback to using the generic 
> > > acpi layer again. YMMV.
> > ---
> > Good thing to know it's just not happening to me also. I also have
> > client machines this has affected and my own personal machines. This was
> > with the p4-clockmod driver. Motherbords all were Asus. Also affected
> > one Celeron machine on an Asus board.
> > 
> > JohnStanley
> 
> I have some older socket 604 533 FSB Xeon's with supermicro x5da8
> motherboards and I've never gotten any of the power management, or even
> the poweroff or suspend command to work with any linux kernel on these
> boards.  The bios code could be blamed, but I've booted other OSes that
> are capable of doing power management on this board.
> 
> In any case, are there particular motherboards, i.e. Intel, Tyan, Asus,
> Supermicro and/or brands of systems, i.e. Dell, HP that are known to
> work well with CentOS and support power management properly?
> 
> Nataraj
---
I can say that the one with the Celeron Processor has an Asus OEM Board
but it is a Compaq/Hp System and Suspend does work on it. Now all my
desktops I have suspend turned off. That particular one i had to
manually load the driver restart cpuspeed and acpi. Pretty much all Dell
Server systems had the on-demand governor loaded with I dislike. Also
that is correct that some Bioses are not compatable. Some brands of
boards I would never suspect it to work.

JohnStanley



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