Cool 'n Quiet

  • Thread starter Thread starter bards1888
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bards1888

can anyone cofirm/deny that cool'n quiet only works in 64 bit mode,
under linux specifically. I have tried Centos 4.2 (Redhat Clone) and
when I install the i386 version it does not throttle the CPU (cat
/proc/cpuinfo shows the CPU always at maximum speed) however on the
64bit version the CPU slows down to 1ghz courtesy of the 'cpuspeed'
daemon. This daemon does not even seem to exist on the i386 version.


Cheers.


Bards.
 
can anyone cofirm/deny that cool'n quiet only works in 64 bit mode,
under linux specifically. I have tried Centos 4.2 (Redhat Clone) and
when I install the i386 version it does not throttle the CPU (cat
/proc/cpuinfo shows the CPU always at maximum speed) however on the
64bit version the CPU slows down to 1ghz courtesy of the 'cpuspeed'
daemon. This daemon does not even seem to exist on the i386 version.


Cheers.


Bards.
Click to expand...

Cool and Quiet works in 32 bit mode as long as you have the CPU
performance governors installed. Redhat includes the governors in 64 bit
FC and RHEL but they don't in 32 bit. I always build my own kernels so I
don't know if there is an RPM for the performance governors available or
even simpler if it's just a matter of doing a modprobe. If you build your
own kernel just build in the performance governors,

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
CONFIG_CPU_FREQ_DEBUG=y
CONFIG_CPU_FREQ_STAT=m
CONFIG_CPU_FREQ_STAT_DETAILS=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
 
bards1888 said:
can anyone cofirm/deny that cool'n quiet only works in 64 bit mode,
under linux specifically. I have tried Centos 4.2 (Redhat Clone) and
when I install the i386 version it does not throttle the CPU (cat
/proc/cpuinfo shows the CPU always at maximum speed) however on the
64bit version the CPU slows down to 1ghz courtesy of the 'cpuspeed'
daemon. This daemon does not even seem to exist on the i386 version.


Cheers.


Bards.
Click to expand...

Just went through this a bit yesterday, enabling C & Q on a 64 bit
Athlon 3800+ under FC4 running a stock 32 bit kernel.

The powersave daemon and a front end GUI config tool, kpowersave, are
available at http://sourceforge.net/projects/powersave/ Note that it may be
necessary to upgrade your dbus and hal rpms to get these two packages
working.

C & Q now works on my machine. Will start working on enabling
temperature sensors and fan speed settings in the near future.
 
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