Speedstep not working with M740 Pentium M Processors SOLVED

[trakon88]

Hi,

I had the problem that speedstep-centrino driver could not be loaded on this CPU
cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : Intel(R) Pentium(R) M processor 1.73GHz
stepping : 8
cpu MHz : 1733.000

the speedstep driver in the kernel (2.6.16-gentoo-r3) 'doesn't know' this stepping ...

after 'googeling' a while I found this patch:
http://www.vdlinde.org/joomla/images/stories/cpufreq-speedstep-dothan-C0.patch.gz

I patched the kernel:

# gzip -d cpufreq-speedstep-dothan-C0.patch

# cp cpufreq-speedstep-dothan-C0.patch /usr/src/linux/arch/i386/kernel/cpu/cpufreq/cpufreq-speedstep-dothan-C0.patch

# cd /usr/src/linux/arch/i386/kernel/cpu/cpufreq

# patch speedstep-centrino.c cpufreq-speedstep-dothan-C0.patch <<< This worked for this Kernel: 2.6.16-gentoo-r3

recompiled
and now it works ... FINE!

my suggestion would be to put the patch into the gentoo-sources patchset ... because I found it very anoying not to have the speedstep-centrino ...

I found everything on http://www.vdlinde.org/joomla/index.php?option=com_content&task=view&id=13&Itemid=29 (it's german!)

greetings aleX