powernow-k7 does not work with 2.6.12 and SMP enabled

Hello,

(please CC me on replies as I'm not subscribed to the list, thanks.)

Compiling 2.6.12.3 with SMP-support *enabled* leads to a non-working powernow-k7-module on my laptop using mobile AMD Duron(tm) ["Error inserting powernow_k7 ... No such device"].

Disabling SMP-support results in a working module ["powernow:
Minimum speed 500 MHz. Maximum speed 1100 MHz."].

I do know that there are some issues with enabled SMP, but:
powernow-k7 works for me with 2.6.11 and *enabled* SMP.

Is there a specific reason why it does not work with 2.6.12 anymore? Using the nosmp-kernelparameter (tell an SMP kernel to act as a UP kernel) does not change the situation. Why does not the system behave then like a kernel without SMP-support?

Relevant diff-output of dmesg booting once with a non-smp-kernel (dmesg.2.6.12.3) and once with a smp-enabled kernel (dmesg.2.6.12.3-smp):

--- dmesg.2.6.12.3 2005-07-30 12:23:56.000000000 +0200
+++ dmesg.2.6.12.3-smp 2005-07-30 12:27:01.000000000 +0200 -Detected 1100.559 MHz processor.
+Detected 1100.268 MHz processor.
[...]
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
-CPU: AMD mobile AMD Duron(tm) stepping 02
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done. Checking 'hlt' instruction... OK.
ACPI: setting ELCR to 0200 (from 0620)
+CPU0: AMD mobile AMD Duron(tm) stepping 02
+SMP motherboard not detected.
+Local APIC not detected. Using dummy APIC emulation. +Brought up 1 CPUs
+CPU0 attaching sched-domain:
+ domain 0: span 0001
+ groups: 0001
+ domain 1: span 0001
+ groups: 0001
NET: Registered protocol family 16
[...]
[...]
powernow: PowerNOW! Technology present. Can scale: frequency and voltage.
-Detected 1100.387 MHz processor.
-powernow: SGTC: 10000
-powernow: Minimum speed 500 MHz. Maximum speed 1100 MHz.

Any chances that powernow(-k7) will work again with SMP-enabled kernels? (I'd like to ship a smp-enabled kernel with my linux-live-cd but use cpufreq anyway.)

More detailed information (dmesg-output, kernelconfig, cpuinfo) can be found on http://grml.org/cpufreq/

I'd appreciate any feedback/help.

regards,
-mika-

 ,'"`.         http://www.michael-prokop.at/
(  grml.org -» Linux for texttool-users and sysadmins
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