Red Hat Bugzilla – Bug 173289
No powernow-k8 in x86_64 kernel
Last modified: 2015-01-04 17:23:05 EST
In the latest update kernel, kernel-2.6.14-1.1637_FC4, for x86_64 there is no
powernow-k8.ko in the /lib/modules tree. The module is present in the i386 kernel.
Digging around in the SRPM, I see that the config for powernow-k8 on x86_64 is
"y", not "m". (It's "m" for i386.) Yet I don't see any info in sysfs. The
directory /sys/devices/system/cpu/cpu0 is empty. cpuspeed's initscript fails
attempting to modprobe acpi-cpufreq, and there's no separate module to load
instead. (See bug 170979.)
Can you paste the output of dmesg please (also boot with cpufreq.debug=7)
Attaching. I see of particular note that it's not picking up any tables from the
powernow-k8: Found 1 AMD Athlon 64 / Opteron processors (version 1.50.4)
cpufreq-core: trying to register driver powernow-k8
cpufreq-core: adding CPU 0
powernow-k8: register performance failed: bad ACPI data
powernow-k8: BIOS error - no PSB or ACPI _PSS objects
cpufreq-core: initialization failed
cpufreq-core: no CPU initialized for driver powernow-k8
cpufreq-core: unregistering CPU 0
The motherboard is a DFI LAN Party UT nF4 Ultra D with a Venice core installed.
Created attachment 121118 [details]
dmesg with cpufreq.debug=7
Updating the BIOS to version 623-3 allows powernow-k8 to load. The cpuspeed
initscript now completes successfully. It would be desirable if the error
message about the BIOS error was available at normal output level, as that's
what points to the necessary fix.
agreed. I've made that change in the upstream cpufreq tree, it'll filter into
Linus' tree shortly after 2.6.15, and Fedora shortly after that.