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* Core2Duo locked at 800MHz
@ 2007-11-26  6:49 Michael Reinelt
  2007-11-26 19:09 ` Dave Jones
  0 siblings, 1 reply; 8+ messages in thread
From: Michael Reinelt @ 2007-11-26  6:49 UTC (permalink / raw)
  To: cpufreq

Hi there,

I got a strange problem here...

I have a Fujitsu Lifebook E8410 with a 2.4GHz Core2Duo CPU. When I load 
and run various cpufreu utilities, after some time the CPU gets locked 
at 800MHz (the lowest possible frequency)

I tried to debug a bit, but I'm unable to interpret things, so I'm 
asking for some advice.

What I found out is that the problem seems to be related to ACPI or the 
acpi-cpufreq module. When I boot the notebook into single-user mode 
(using vanilla 2.6.23 or 2.6.24-rc3), with no modules loaded, the cpu 
runs at 2.4GHz. As soon as I laod the acpi-cpufreq module, the upper 
limit falls in some steps (2 GHz, 1200MHz) to 800 MHz. Note that there 
is neither acpid nor any powersave daemon running!

I tried to play with cpufreq.debug, but I don't know what all the 
messages are about :-(

I already installed the latest BIOS 1.08 from Fujitsu, but nothing changes.

At the moment my workaround is *not* to load acpi-cpufreq, so the CPU 
stays at 2.4GHz all the time, but I really want to use powersaving with 
the machine....

I'm willing to provide all necessary infos If you tell me what to to.


Thanks in advance, Michael

-- 
Michael Reinelt <michael@reinelt.co.at>
http://home.pages.at/reinelt
GPG-Key 0xDF13BA50
ICQ #288386781

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2007-11-27 19:05 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2007-11-26  6:49 Core2Duo locked at 800MHz Michael Reinelt
2007-11-26 19:09 ` Dave Jones
2007-11-27  6:10   ` Michael Reinelt
2007-11-27 10:47     ` Thomas Renninger
2007-11-27 14:36       ` Michael Reinelt
2007-11-27 14:53         ` Thomas Renninger
2007-11-27 15:27           ` Pallipadi, Venkatesh
2007-11-27 19:05       ` Dave Jones

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