[Bug 202651] cpufreq no longer works in 10.2 on Intel D525MWV

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202651

            Bug ID: 202651
           Summary: cpufreq no longer works in 10.2 on Intel D525MWV
           Product: Base System
           Version: 10.2-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: viktor.stujber at gmail.com

After updating from 10.1-RELENG (2014-12-07) to 10.2-RELEASE, I can no longer
manage the CPU's frequency.

kernel: Starting powerd.
kernel: powerd: no cpufreq(4) support -- aborting: No such file or directory

This is the consequence of sysctls 'dev.cpu.X.freq' and 'dev.cpu.X.freq_levels'
not being registered, indicating a problem with the 'cpufreq' module. I
built/installed a clean GENERIC kernel and all available modules, but the
problem still persists.

I tried setting sysctl debug.cpufreq.verbose=1, which according to
sys/kern/kern_cpu.c activates CF_DEBUG() calls. But the message in
cpufreq_attach(), that should say "cpufreq: initializing %s", does not show up.
I don't know if this means that the module doesn't even try to load. Help would
be appreciated.

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