[Bug 434255] [NEW] speedstep-ich no longer loads with kernel 2.6.31 on a IBM Thinkpad T23

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I have an IBM Thinkpad T23 running Ubuntu 9.04 with my own vanilla
kernels (no Ubuntu patches).

On all of my kernels up to 2.6.30.7 the Pentium-IIIm in my notebook
speedsteps the frequency. Here is a part of the lsmod output (running
kernel 2.6.30.7):

root at stefan2:/sys# lsmod
...
speedstep_ich           3108  0 
speedstep_lib           4120  1 speedstep_ich
cpufreq_powersave       1300  0 
cpufreq_stats           4084  0 
cpufreq_performance     1332  0 
cpufreq_ondemand        6760  1 
cpufreq_conservative     6824  0 
freq_table              4180  3 speedstep_ich,cpufreq_stats,cpufreq_ondemand
...

With exactly the same settings regarding cpu frequency scaling, the
kernel 2.6.31 no longer seems to support speedstepping on my notebook.
The module speedstep-ich does not load. I get the error "no such
device".

I also tried to use acpi-cpufreq instead - I get the same "no such
device" error.

Info about the CPU:

root at stefan2:/sys# cat /proc/cpuinfo 
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 11
model name	: Intel(R) Pentium(R) III Mobile CPU      1133MHz
stepping	: 1
cpu MHz		: 731.500
cache size	: 512 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36 mmx fxsr sse
bogomips	: 1465.22
clflush size	: 32
power management:


Stefan Förster

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: 2.6.31 cpufreq kernel speedstep-ich
-- 
speedstep-ich no longer loads with kernel 2.6.31 on a IBM Thinkpad T23
https://bugs.launchpad.net/bugs/434255
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