Re: i8k on Inspiron 5150 (to attempt to address overheating)
On Sun, 2006-01-29 at 00:58 +0100, Anders Breindahl wrote:
> On 2006-01-29 0626, Michael Abbott wrote:
> > Also, any general overheating help would be most appreciated. I've
> > tried a couple things now: Disable apmd. Run on a non-SMP kernel
> > instead. All to no avail. There are some hardware related solutions
> > that I might avoid (until I get this working at least) since I didn't
> > have the same overheating issues under WinXP (which hopefully means
> > there is a software fix ;).
>
> I need to ask -- do you step down the CPU's speed (known as
> ``speedstepping'', in the Pentium M world)?
>
> If not, that might remedy it: Windows XP does this per default, and that
> would cause the processor to have a lot of time to cool in.
A Google search told me that powernowd is responsible for this. A run
tells me this:
mabster@mab:/proc$ sudo powernowd
powernowd: PowerNow Daemon v0.96, (c) 2003-2005 John Clemens
powernowd: Found 1 cpus: -- 2 threads (or cores) per physical cpu
powernowd: cpu0: 1599Mhz - 3066Mhz (2 steps)
powernowd: cpu1: 1599Mhz - 3066Mhz (2 steps)
mabster@mab:/proc$ sudo powernowd -v
powernowd: PowerNow Daemon v0.96, (c) 2003-2005 John Clemens
powernowd: Settings:
powernowd: verbosity: 1
powernowd: mode: 1 (AGGRESSIVE)
powernowd: step: 100 MHz (100000 kHz)
powernowd: lowwater: 20 %
powernowd: highwater: 80 %
powernowd: poll interval: 1000 ms
powernowd: Found 1 cpus: -- 2 threads (or cores) per physical cpu
powernowd: cpu0: 1599Mhz - 3066Mhz (2 steps)
powernowd: step1 : 3066Mhz
powernowd: step2 : 1599Mhz
powernowd: cpu1: 1599Mhz - 3066Mhz (2 steps)
powernowd: step1 : 3066Mhz
powernowd: step2 : 1599Mhz
Does that even make sense considering each of my "cores" should be
"1.6Ghz"?! I would have thought that 1.6Ghz -> 3Ghz means the processor
would /never/ speedstep?
> By the way, at what wattage does that machine run? My girlfriend's I1300
> sits at 23-26W -- I was impressed.
I have no idea :( I can have a look at the manual at work on Monday and
see if they have that info. If anything the wattage will be crazy --
this machine would suck power like nothing else :P
Thanks,
- Mab
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