From: Michael Prokop <mika@grml.org>
To: cpufreq@lists.linux.org.uk
Subject: powernow-k7 does not work with 2.6.12 and SMP enabled
Date: Sat, 30 Jul 2005 13:02:45 +0200 [thread overview]
Message-ID: <2005-07-30T12-45-38@devnull.michael-prokop.at> (raw)
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
`._,' http://www.grml.org/
reply other threads:[~2005-07-30 11:02 UTC|newest]
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